var H5P = H5P || {};
/**
 * Transition contains helper function relevant for transitioning
 */
H5P.Transition = (function ($) {

  /**
   * @class
   * @namespace H5P
   */
  Transition = {};

  /**
   * @private
   */
  Transition.transitionEndEventNames = {
    'WebkitTransition': 'webkitTransitionEnd',
    'transition':       'transitionend',
    'MozTransition':    'transitionend',
    'OTransition':      'oTransitionEnd',
    'msTransition':     'MSTransitionEnd'
  };

  /**
   * @private
   */
  Transition.cache = [];

  /**
   * Get the vendor property name for an event
   *
   * @function H5P.Transition.getVendorPropertyName
   * @static
   * @private
   * @param  {string} prop Generic property name
   * @return {string}      Vendor specific property name
   */
  Transition.getVendorPropertyName = function (prop) {

    if (Transition.cache[prop] !== undefined) {
      return Transition.cache[prop];
    }

    var div = document.createElement('div');

    // Handle unprefixed versions (FF16+, for example)
    if (prop in div.style) {
      Transition.cache[prop] = prop;
    }
    else {
      var prefixes = ['Moz', 'Webkit', 'O', 'ms'];
      var prop_ = prop.charAt(0).toUpperCase() + prop.substr(1);

      if (prop in div.style) {
        Transition.cache[prop] = prop;
      }
      else {
        for (var i = 0; i < prefixes.length; ++i) {
          var vendorProp = prefixes[i] + prop_;
          if (vendorProp in div.style) {
            Transition.cache[prop] = vendorProp;
            break;
          }
        }
      }
    }

    return Transition.cache[prop];
  };

  /**
   * Get the name of the transition end event
   *
   * @static
   * @private
   * @return {string}  description
   */
  Transition.getTransitionEndEventName = function () {
    return Transition.transitionEndEventNames[Transition.getVendorPropertyName('transition')] || undefined;
  };

  /**
   * Helper function for listening on transition end events
   *
   * @function H5P.Transition.onTransitionEnd
   * @static
   * @param  {domElement} $element The element which is transitioned
   * @param  {function} callback The callback to be invoked when transition is finished
   * @param  {number} timeout  Timeout in milliseconds. Fallback if transition event is never fired
   */
  Transition.onTransitionEnd = function ($element, callback, timeout) {
    // Fallback on 1 second if transition event is not supported/triggered
    timeout = timeout || 1000;
    Transition.transitionEndEventName = Transition.transitionEndEventName || Transition.getTransitionEndEventName();
    var callbackCalled = false;

    var doCallback = function () {
      if (callbackCalled) {
        return;
      }
      $element.off(Transition.transitionEndEventName, callback);
      callbackCalled = true;
      clearTimeout(timer);
      callback();
    };

    var timer = setTimeout(function () {
      doCallback();
    }, timeout);

    $element.on(Transition.transitionEndEventName, function () {
      doCallback();
    });
  };

  /**
   * Wait for a transition - when finished, invokes next in line
   *
   * @private
   *
   * @param {Object[]}    transitions             Array of transitions
   * @param {H5P.jQuery}  transitions[].$element  Dom element transition is performed on
   * @param {number=}     transitions[].timeout   Timeout fallback if transition end never is triggered
   * @param {bool=}       transitions[].break     If true, sequence breaks after this transition
   * @param {number}      index                   The index for current transition
   */
  var runSequence = function (transitions, index) {
    if (index >= transitions.length) {
      return;
    }

    var transition = transitions[index];
    H5P.Transition.onTransitionEnd(transition.$element, function () {
      if (transition.end) {
        transition.end();
      }
      if (transition.break !== true) {
        runSequence(transitions, index+1);
      }
    }, transition.timeout || undefined);
  };

  /**
   * Run a sequence of transitions
   *
   * @function H5P.Transition.sequence
   * @static
   * @param {Object[]}    transitions             Array of transitions
   * @param {H5P.jQuery}  transitions[].$element  Dom element transition is performed on
   * @param {number=}     transitions[].timeout   Timeout fallback if transition end never is triggered
   * @param {bool=}       transitions[].break     If true, sequence breaks after this transition
   */
  Transition.sequence = function (transitions) {
    runSequence(transitions, 0);
  };

  return Transition;
})(H5P.jQuery);
;/** @namespace H5P */
H5P.VideoVimeo = (function ($) {

  let numInstances = 0;

  /**
   * Vimeo video player for H5P.
   *
   * @class
   * @param {Array} sources Video files to use
   * @param {Object} options Settings for the player
   * @param {Object} l10n Localization strings
   */
  function VimeoPlayer(sources, options, l10n) {
    const self = this;

    let player;

    // Since all the methods of the Vimeo Player SDK are promise-based, we keep
    // track of all relevant state variables so that we can implement the
    // H5P.Video API where all methods return synchronously.
    let buffered = 0;
    let currentQuality;
    let currentTextTrack;
    let currentTime = 0;
    let duration = 0;
    let isMuted = 0;
    let volume = 0;
    let playbackRate = 1;
    let qualities = [];
    let loadingFailedTimeout;
    let failedLoading = false;
    let ratio = 9/16;
    let isLoaded = false;

    const LOADING_TIMEOUT_IN_SECONDS = 8;

    const id = `h5p-vimeo-${++numInstances}`;
    const $wrapper = $('<div/>');
    const $placeholder = $('<div/>', {
      id: id,
      html: `<div class="h5p-video-loading" style="height: 100%; min-height: 200px; display: block; z-index: 100;" aria-label="${l10n.loading}"></div>`
    }).appendTo($wrapper);

    /**
     * Create a new player with the Vimeo Player SDK.
     *
     * @private
     */
    const createVimeoPlayer = async () => {
      if (!$placeholder.is(':visible') || player !== undefined) {
        return;
      }

      // Since the SDK is loaded asynchronously below, explicitly set player to
      // null (unlike undefined) which indicates that creation has begun. This
      // allows the guard statement above to be hit if this function is called
      // more than once.
      player = null;

      const Vimeo = await loadVimeoPlayerSDK();

      const MIN_WIDTH = 200;
      const width = Math.max($wrapper.width(), MIN_WIDTH);

      const canHasControls = options.controls || self.pressToPlay;
      const embedOptions = {
        url: sources[0].path,
        controls: canHasControls,
        responsive: true,
        dnt: true,
        // Hardcoded autoplay to false to avoid playing videos on init
        autoplay: false,
        loop: options.loop ? true : false,
        playsinline: true,
        quality: 'auto',
        width: width,
        muted: false,
        keyboard: canHasControls,
      };

      // Create a new player
      player = new Vimeo.Player(id, embedOptions);

      registerVimeoPlayerEventListeneners(player);

      // Failsafe timeout to handle failed loading of videos.
      // This seems to happen for private videos even though the SDK docs
      // suggests to catch PrivacyError when attempting play()
      loadingFailedTimeout = setTimeout(() => {
        failedLoading = true;
        removeLoadingIndicator();
        $wrapper.html(`<p class="vimeo-failed-loading">${l10n.vimeoLoadingError}</p>`);
        $wrapper.css({
          width: null,
          height: null
        });
        self.trigger('resize');
        self.trigger('error', l10n.vimeoLoadingError);
      }, LOADING_TIMEOUT_IN_SECONDS * 1000);
    }

    const removeLoadingIndicator = () => {
      $placeholder.find('div.h5p-video-loading').remove();
    };

    /**
     * Register event listeners on the given Vimeo player.
     *
     * @private
     * @param {Vimeo.Player} player
     */
    const registerVimeoPlayerEventListeneners = (player) => {
      let isFirstPlay, tracks;
      player.on('loaded', async () => {
        isFirstPlay = true;
        isLoaded = true;
        clearTimeout(loadingFailedTimeout);

        const videoDetails = await getVimeoVideoMetadata(player);
        tracks = videoDetails.tracks.options;
        currentTextTrack = tracks.current;
        duration = videoDetails.duration;
        qualities = videoDetails.qualities;
        currentQuality = 'auto';
        try {
          ratio = videoDetails.dimensions.height / videoDetails.dimensions.width;
        }
        catch (e) { /* Intentionally ignore this, and fallback on the default ratio */ }

        removeLoadingIndicator();

        if (options.startAt) {
          // Vimeo.Player doesn't have an option for setting start time upon
          // instantiation, so we instead perform an initial seek here.
          currentTime = await self.seek(options.startAt);
        }

        self.trigger('ready');
        self.trigger('loaded');
        self.trigger('qualityChange', currentQuality);
        self.trigger('resize');
      });

      player.on('play', () => {
        if (isFirstPlay) {
          isFirstPlay = false;
          if (tracks.length) {
            self.trigger('captions', tracks);
          }
        }
      });

      // Handle playback state changes.
      player.on('playing', () => self.trigger('stateChange', H5P.Video.PLAYING));
      player.on('pause', () => self.trigger('stateChange', H5P.Video.PAUSED));
      player.on('ended', () => self.trigger('stateChange', H5P.Video.ENDED));

      // Track the percentage of video that has finished loading (buffered).
      player.on('progress', (data) => {
        buffered = data.percent * 100;
      });

      // Track the current time. The update frequency may be browser-dependent,
      // according to the official docs:
      // https://developer.vimeo.com/player/sdk/reference#timeupdate
      player.on('timeupdate', (time) => {
        currentTime = time.seconds;
      });
    };

    /**
     * Get metadata about the video loaded in the given Vimeo player.
     *
     * Example resolved value:
     *
     * ```
     * {
     *   "duration": 39,
     *   "qualities": [
     *     {
     *       "name": "auto",
     *       "label": "Auto"
     *     },
     *     {
     *       "name": "1080p",
     *       "label": "1080p"
     *     },
     *     {
     *       "name": "720p",
     *       "label": "720p"
     *     }
     *   ],
     *   "dimensions": {
     *     "width": 1920,
     *     "height": 1080
     *   },
     *   "tracks": {
     *     "current": {
     *       "label": "English",
     *       "value": "en"
     *     },
     *     "options": [
     *       {
     *         "label": "English",
     *         "value": "en"
     *       },
     *       {
     *         "label": "Norsk bokmål",
     *         "value": "nb"
     *       }
     *     ]
     *   }
     * }
     * ```
     *
     * @private
     * @param {Vimeo.Player} player
     * @returns {Promise}
     */
    const getVimeoVideoMetadata = (player) => {
      // Create an object for easy lookup of relevant metadata
      const massageVideoMetadata = (data) => {
        const duration = data[0];
        const qualities = data[1].map(q => ({
          name: q.id,
          label: q.label
        }));
        const tracks = data[2].reduce((tracks, current) => {
          const h5pVideoTrack = new H5P.Video.LabelValue(current.label, current.language);
          tracks.options.push(h5pVideoTrack);
          if (current.mode === 'showing') {
            tracks.current = h5pVideoTrack;
          }
          return tracks;
        }, { current: undefined, options: [] });
        const dimensions = { width: data[3], height: data[4] };

        return {
          duration,
          qualities,
          tracks,
          dimensions
        };
      };

      return Promise.all([
        player.getDuration(),
        player.getQualities(),
        player.getTextTracks(),
        player.getVideoWidth(),
        player.getVideoHeight(),
      ]).then(data => massageVideoMetadata(data));
    }

    try {
      if (document.featurePolicy.allowsFeature('autoplay') === false) {
        self.pressToPlay = true;
      }
    }
    catch (err) {}

    /**
     * Appends the video player to the DOM.
     *
     * @public
     * @param {jQuery} $container
     */
    self.appendTo = ($container) => {
      $container.addClass('h5p-vimeo').append($wrapper);
      createVimeoPlayer();
    };

    /**
     * Get list of available qualities.
     *
     * @public
     * @returns {Array}
     */
    self.getQualities = () => {
      return qualities;
    };

    /**
     * Get the current quality.
     *
     * @returns {String} Current quality identifier
     */
    self.getQuality = () => {
      return currentQuality;
    };

    /**
     * Set the playback quality.
     *
     * @public
     * @param {String} quality
     */
    self.setQuality = async (quality) => {
      currentQuality = await player.setQuality(quality);
      self.trigger('qualityChange', currentQuality);
    };

    /**
     * Start the video.
     *
     * @public
     */
    self.play = async () => {
      if (!player) {
        self.on('ready', self.play);
        return;
      }

      try {
        await player.play();
      }
      catch (error) {
        switch (error.name) {
          case 'PasswordError': // The video is password-protected
            self.trigger('error', l10n.vimeoPasswordError);
            break;

          case 'PrivacyError': // The video is private
            self.trigger('error', l10n.vimeoPrivacyError);
            break;

          default:
            self.trigger('error', l10n.unknownError);
            break;
        }
      }
    };

    /**
     * Pause the video.
     *
     * @public
     */
    self.pause = () => {
      if (player) {
        player.pause();
      }
    };

    /**
     * Seek video to given time.
     *
     * @public
     * @param {Number} time
     */
    self.seek = async (time) => {
      if (!player) {
        return;
      }

      currentTime = time;
      await player.setCurrentTime(time);
    };

    /**
     * @public
     * @returns {Number} Seconds elapsed since beginning of video
     */
    self.getCurrentTime = () => {
      return currentTime;
    };

    /**
     * @public
     * @returns {Number} Video duration in seconds
     */
    self.getDuration = () => {
      return duration;
    };

    /**
     * Get percentage of video that is buffered.
     *
     * @public
     * @returns {Number} Between 0 and 100
     */
    self.getBuffered = () => {
      return buffered;
    };

    /**
     * Mute the video.
     *
     * @public
     */
    self.mute = async () => {
      isMuted = await player.setMuted(true);
    };

    /**
     * Unmute the video.
     *
     * @public
     */
    self.unMute = async () => {
      isMuted = await player.setMuted(false);
    };

    /**
     * Whether the video is muted.
     *
     * @public
     * @returns {Boolean} True if the video is muted, false otherwise
     */
    self.isMuted = () => {
      return isMuted;
    };

    /**
     * Whether the video is loaded.
     *
     * @public
     * @returns {Boolean} True if the video is muted, false otherwise
     */
    self.isLoaded = () => {
      return isLoaded;
    };

    /**
     * Get the video player's current sound volume.
     *
     * @public
     * @returns {Number} Between 0 and 100.
     */
    self.getVolume = () => {
      return volume;
    };

    /**
     * Set the video player's sound volume.
     *
     * @public
     * @param {Number} level
     */
    self.setVolume = async (level) => {
      volume = await player.setVolume(level);
    };

    /**
     * Get list of available playback rates.
     *
     * @public
     * @returns {Array} Available playback rates
     */
    self.getPlaybackRates = () => {
      return [0.5, 1, 1.5, 2];
    };

    /**
     * Get the current playback rate.
     *
     * @public
     * @returns {Number} e.g. 0.5, 1, 1.5 or 2
     */
    self.getPlaybackRate = () => {
      return playbackRate;
    };

    /**
     * Set the current playback rate.
     *
     * @public
     * @param {Number} rate Must be one of available rates from getPlaybackRates
     */
    self.setPlaybackRate = async (rate) => {
      playbackRate = await player.setPlaybackRate(rate);
      self.trigger('playbackRateChange', rate);
    };

    /**
     * Set current captions track.
     *
     * @public
     * @param {H5P.Video.LabelValue} track Captions to display
     */
    self.setCaptionsTrack = (track) => {
      if (!track) {
        return player.disableTextTrack().then(() => {
          currentTextTrack = null;
        });
      }

      player.enableTextTrack(track.value).then(() => {
        currentTextTrack = track;
      });
    };

    /**
     * Get current captions track.
     *
     * @public
     * @returns {H5P.Video.LabelValue}
     */
    self.getCaptionsTrack = () => {
      return currentTextTrack;
    };

    self.on('resize', () => {
      if (failedLoading || !$wrapper.is(':visible')) {
        return;
      }

      if (player === undefined) {
        // Player isn't created yet. Try again.
        createVimeoPlayer();
        return;
      }

      // Use as much space as possible
      $wrapper.css({
        width: '100%',
        height: 'auto'
      });

      const width = $wrapper[0].clientWidth;
      const height = options.fit ? $wrapper[0].clientHeight : (width * (ratio));

      // Validate height before setting
      if (height > 0) {
        // Set size
        $wrapper.css({
          width: width + 'px',
          height: height + 'px'
        });
      }
    });
  }

  /**
   * Check to see if we can play any of the given sources.
   *
   * @public
   * @static
   * @param {Array} sources
   * @returns {Boolean}
   */
  VimeoPlayer.canPlay = (sources) => {
    return getId(sources[0].path);
  };

  /**
   * Find id of Vimeo video from given URL.
   *
   * @private
   * @param {String} url
   * @returns {String} Vimeo video ID
   */
  const getId = (url) => {
    // https://stackoverflow.com/a/11660798
    const matches = url.match(/^.*(vimeo\.com\/)((channels\/[A-z]+\/)|(groups\/[A-z]+\/videos\/))?([0-9]+)/);
    if (matches && matches[5]) {
      return matches[5];
    }
  };

  /**
   * Load the Vimeo Player SDK asynchronously.
   *
   * @private
   * @returns {Promise} Vimeo Player SDK object
   */
  const loadVimeoPlayerSDK = async () => {
    if (window.Vimeo) {
      return await Promise.resolve(window.Vimeo);
    }

    return await new Promise((resolve, reject) => {
      const tag = document.createElement('script');
      tag.src = 'https://player.vimeo.com/api/player.js';
      tag.onload = () => resolve(window.Vimeo);
      tag.onerror = reject;
      document.querySelector('script').before(tag);
    });
  };

  return VimeoPlayer;
})(H5P.jQuery);

// Register video handler
H5P.videoHandlers = H5P.videoHandlers || [];
H5P.videoHandlers.push(H5P.VideoVimeo);
;/** @namespace H5P */
H5P.VideoYouTube = (function ($) {

  /**
   * YouTube video player for H5P.
   *
   * @class
   * @param {Array} sources Video files to use
   * @param {Object} options Settings for the player
   * @param {Object} l10n Localization strings
   */
  function YouTube(sources, options, l10n) {
    var self = this;

    var player;
    var playbackRate = 1;
    var id = 'h5p-youtube-' + numInstances;
    numInstances++;
    var ratio = 9/16;
    var $wrapper = $('<div/>');
    var $placeholder = $('<div />', {
      text: l10n.loading,
      html: `<div style="position: relative; padding: ${ratio*100}% 0 0 0;"><div id="${id}"></div></div>`
    }).appendTo($wrapper);

    // Optional placeholder
    // var $placeholder = $('<iframe id="' + id + '" type="text/html" width="640" height="360" src="https://www.youtube.com/embed/' + getId(sources[0].path) + '?enablejsapi=1&origin=' + encodeURIComponent(ORIGIN) + '&autoplay=' + (options.autoplay ? 1 : 0) + '&controls=' + (options.controls ? 1 : 0) + '&disabledkb=' + (options.controls ? 0 : 1) + '&fs=0&loop=' + (options.loop ? 1 : 0) + '&rel=0&showinfo=0&iv_load_policy=3" frameborder="0"></iframe>').appendTo($wrapper);

    /**
     * Use the YouTube API to create a new player
     *
     * @private
     */
    var create = function () {
      if (!$placeholder.is(':visible') || player !== undefined) {
        return;
      }

      if (window.YT === undefined) {
        // Load API first
        loadAPI(create);
        return;
      }
      if (YT.Player === undefined) {
        return;
      }

      var width = $wrapper.width();
      if (width < 200) {
        width = 200;
      }

      var loadCaptionsModule = true;

      var videoId = getId(sources[0].path);

      player = new YT.Player(id, {
        width: width,
        height: width * (9/16),
        videoId: videoId,
        playerVars: {
          origin: ORIGIN,
          // Hardcoded autoplay to false to avoid playing videos on init
          autoplay: 0,
          controls: options.controls ? 1 : 0,
          disablekb: options.controls ? 0 : 1,
          fs: 0,
          loop: options.loop ? 1 : 0,
          playlist: options.loop ? videoId : undefined,
          rel: 0,
          showinfo: 0,
          iv_load_policy: 3,
          wmode: "opaque",
          start: Math.floor(options.startAt),
          playsinline: 1
        },
        events: {
          onReady: function () {
            self.trigger('ready');
            self.trigger('loaded');

            if (!options.autoplay) {
              self.toPause = true;
            }
            
            if (options.deactivateSound) {
              self.mute();
            }
          },
          onApiChange: function () {
            if (loadCaptionsModule) {
              loadCaptionsModule = false;

              // Always load captions
              player.loadModule('captions');
            }

            var trackList;
            try {
              // Grab tracklist from player
              trackList = player.getOption('captions', 'tracklist');
            }
            catch (err) {}
            if (trackList && trackList.length) {

              // Format track list into valid track options
              var trackOptions = [];
              for (var i = 0; i < trackList.length; i++) {
                trackOptions.push(new H5P.Video.LabelValue(trackList[i].displayName, trackList[i].languageCode));
              }

              // Captions are ready for loading
              self.trigger('captions', trackOptions);
            }
          },
          onStateChange: function (state) {
            if (state.data > -1 && state.data < 4) {
              if (self.toPause) {
                // if video buffering, was likely paused already - skip
                if (state.data === H5P.Video.BUFFERING) {
                  delete self.toPause;
                }
                else {
                  self.pause();
                }
              }

              // Fix for keeping playback rate in IE11
              if (H5P.Video.IE11_PLAYBACK_RATE_FIX && state.data === H5P.Video.PLAYING && playbackRate !== 1) {
                // YT doesn't know that IE11 changed the rate so it must be reset before it's set to the correct value
                player.setPlaybackRate(1);
                player.setPlaybackRate(playbackRate);
              }
              // End IE11 fix

              self.trigger('stateChange', state.data);
            }
          },
          onPlaybackQualityChange: function (quality) {
            self.trigger('qualityChange', quality.data);
          },
          onPlaybackRateChange: function (playbackRate) {
            self.trigger('playbackRateChange', playbackRate.data);
          },
          onError: function (error) {
            var message;
            switch (error.data) {
              case 2:
                message = l10n.invalidYtId;
                break;

              case 100:
                message = l10n.unknownYtId;
                break;

              case 101:
              case 150:
                message = l10n.restrictedYt;
                break;

              default:
                message = l10n.unknownError + ' ' + error.data;
                break;
            }
            self.trigger('error', message);
          }
        }
      });
      player.g.style = "position:absolute;top:0;left:0;width:100%;height:100%;";
    };

    /**
     * Indicates if the video must be clicked for it to start playing.
     * For instance YouTube videos on iPad must be pressed to start playing.
     *
     * @public
     */
    if (navigator.userAgent.match(/iPad/i)) {
      self.pressToPlay = true;
    }
    else {
      try {
        if (document.featurePolicy.allowsFeature('autoplay') === false) {
          self.pressToPlay = true;
        }
      }
      catch (err) {}
    }

    /**
    * Appends the video player to the DOM.
    *
    * @public
    * @param {jQuery} $container
    */
    self.appendTo = function ($container) {
      $container.addClass('h5p-youtube').append($wrapper);
      create();
    };

    /**
     * Get list of available qualities. Not available until after play.
     *
     * @public
     * @returns {Array}
     */
    self.getQualities = function () {
      if (!player || !player.getAvailableQualityLevels) {
        return;
      }

      var qualities = player.getAvailableQualityLevels();
      if (!qualities.length) {
        return; // No qualities
      }

      // Add labels
      for (var i = 0; i < qualities.length; i++) {
        var quality = qualities[i];
        var label = (LABELS[quality] !== undefined ? LABELS[quality] : 'Unknown'); // TODO: l10n
        qualities[i] = {
          name: quality,
          label: LABELS[quality]
        };
      }

      return qualities;
    };

    /**
     * Get current playback quality. Not available until after play.
     *
     * @public
     * @returns {String}
     */
    self.getQuality = function () {
      if (!player || !player.getPlaybackQuality) {
        return;
      }

      var quality = player.getPlaybackQuality();
      return quality === 'unknown' ? undefined : quality;
    };

    /**
     * Set current playback quality. Not available until after play.
     * Listen to event "qualityChange" to check if successful.
     *
     * @public
     * @params {String} [quality]
     */
    self.setQuality = function (quality) {
      if (!player || !player.setPlaybackQuality) {
        return;
      }

      player.setPlaybackQuality(quality);
    };

    /**
     * Start the video.
     *
     * @public
     */
    self.play = function () {
      if (!player || !player.playVideo) {
        self.on('ready', self.play);
        return;
      }
      player.playVideo();
    };

    /**
     * Pause the video.
     *
     * @public
     */
    self.pause = function () {
      delete self.toPause;
      self.off('ready', self.play);
      if (!player || !player.pauseVideo) {
        return;
      }
      player.pauseVideo();
    };

    /**
     * Seek video to given time.
     *
     * @public
     * @param {Number} time
     */
    self.seek = function (time) {
      if (!player || !player.seekTo) {
        return;
      }

      player.seekTo(time, true);
    };

    /**
     * Recreate player with initial time
     *
     * @public
     * @param {Number} time
     */
    self.resetPlayback = function (time) {
      options.startAt = time;

      if (player) {
        if (player.getPlayerState() === H5P.Video.PLAYING) {
          player.pauseVideo();
          self.trigger('stateChange', H5P.Video.PAUSED);
        }
        player.destroy();
        player = undefined;
      }

      create();
    }
    /**
     * Get elapsed time since video beginning.
     *
     * @public
     * @returns {Number}
     */
    self.getCurrentTime = function () {
      if (!player || !player.getCurrentTime) {
        return;
      }

      return player.getCurrentTime();
    };

    /**
     * Get total video duration time.
     *
     * @public
     * @returns {Number}
     */
    self.getDuration = function () {
      if (!player || !player.getDuration) {
        return;
      }

      return player.getDuration();
    };

    /**
     * Get percentage of video that is buffered.
     *
     * @public
     * @returns {Number} Between 0 and 100
     */
    self.getBuffered = function () {
      if (!player || !player.getVideoLoadedFraction) {
        return;
      }

      return player.getVideoLoadedFraction() * 100;
    };

    /**
     * Turn off video sound.
     *
     * @public
     */
    self.mute = function () {
      if (!player || !player.mute) {
        return;
      }

      player.mute();
    };

    /**
     * Turn on video sound.
     *
     * @public
     */
    self.unMute = function () {
      if (!player || !player.unMute) {
        return;
      }

      player.unMute();
    };

    /**
     * Check if video sound is turned on or off.
     *
     * @public
     * @returns {Boolean}
     */
    self.isMuted = function () {
      if (!player || !player.isMuted) {
        return;
      }

      return player.isMuted();
    };

    /**
     * Check if video is loaded and ready to play.
     *
     * @public
     * @returns {Boolean}
     */
    self.isLoaded = function () {
      if (!player || !player.getPlayerState) {
        return;
      }

      return player.getPlayerState() === 5;
    };

    /**
     * Return the video sound level.
     *
     * @public
     * @returns {Number} Between 0 and 100.
     */
    self.getVolume = function () {
      if (!player || !player.getVolume) {
        return;
      }

      return player.getVolume();
    };

    /**
     * Set video sound level.
     *
     * @public
     * @param {Number} level Between 0 and 100.
     */
    self.setVolume = function (level) {
      if (!player || !player.setVolume) {
        return;
      }

      player.setVolume(level);
    };

    /**
     * Get list of available playback rates.
     *
     * @public
     * @returns {Array} available playback rates
     */
    self.getPlaybackRates = function () {
      if (!player || !player.getAvailablePlaybackRates) {
        return;
      }

      var playbackRates = player.getAvailablePlaybackRates();
      if (!playbackRates.length) {
        return; // No rates, but the array should contain at least 1
      }

      return playbackRates;
    };

    /**
     * Get current playback rate.
     *
     * @public
     * @returns {Number} such as 0.25, 0.5, 1, 1.25, 1.5 and 2
     */
    self.getPlaybackRate = function () {
      if (!player || !player.getPlaybackRate) {
        return;
      }

      return player.getPlaybackRate();
    };

    /**
     * Set current playback rate.
     * Listen to event "playbackRateChange" to check if successful.
     *
     * @public
     * @params {Number} suggested rate that may be rounded to supported values
     */
    self.setPlaybackRate = function (newPlaybackRate) {
      if (!player || !player.setPlaybackRate) {
        return;
      }

      playbackRate = Number(newPlaybackRate);
      player.setPlaybackRate(playbackRate);
    };

    /**
     * Set current captions track.
     *
     * @param {H5P.Video.LabelValue} Captions track to show during playback
     */
    self.setCaptionsTrack = function (track) {
      player.setOption('captions', 'track', track ? {languageCode: track.value} : {});
    };

    /**
     * Figure out which captions track is currently used.
     *
     * @return {H5P.Video.LabelValue} Captions track
     */
    self.getCaptionsTrack = function () {
      var track = player.getOption('captions', 'track');
      return (track.languageCode ? new H5P.Video.LabelValue(track.displayName, track.languageCode) : null);
    };

    // Respond to resize events by setting the YT player size.
    self.on('resize', function () {
      if (!$wrapper.is(':visible')) {
        return;
      }

      if (!player) {
        // Player isn't created yet. Try again.
        create();
        return;
      }

      // Use as much space as possible
      $wrapper.css({
        width: '100%',
        height: 'auto'
      });

      var width = $wrapper[0].clientWidth;
      var height = options.fit ? $wrapper[0].clientHeight : (width * (9/16));

      // Validate height before setting
      if (height > 0) {
        // Set size
        $wrapper.css({
          width: width + 'px',
          height: height + 'px'
        });

        player.setSize(width, height);
      }
    });
  }

  /**
   * Check to see if we can play any of the given sources.
   *
   * @public
   * @static
   * @param {Array} sources
   * @returns {Boolean}
   */
  YouTube.canPlay = function (sources) {
    return getId(sources[0].path);
  };

  /**
   * Find id of YouTube video from given URL.
   *
   * @private
   * @param {String} url
   * @returns {String} YouTube video identifier
   */

  var getId = function (url) {
    // Has some false positives, but should cover all regular URLs that people can find
    var matches = url.match(/(?:(?:youtube.com\/(?:attribution_link\?(?:\S+))?(?:v\/|embed\/|watch\/|(?:user\/(?:\S+)\/)?watch(?:\S+)v\=))|(?:youtu.be\/|y2u.be\/))([A-Za-z0-9_-]{11})/i);
    if (matches && matches[1]) {
      return matches[1];
    }
  };

  /**
   * Load the IFrame Player API asynchronously.
   */
  var loadAPI = function (loaded) {
    if (window.onYouTubeIframeAPIReady !== undefined) {
      // Someone else is loading, hook in
      var original = window.onYouTubeIframeAPIReady;
      window.onYouTubeIframeAPIReady = function (id) {
        loaded(id);
        original(id);
      };
    }
    else {
      // Load the API our self
      var tag = document.createElement('script');
      tag.src = "https://www.youtube.com/iframe_api";
      var firstScriptTag = document.getElementsByTagName('script')[0];
      firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);
      window.onYouTubeIframeAPIReady = loaded;
    }
  };

  /** @constant {Object} */
  var LABELS = {
    highres: '2160p', // Old API support
    hd2160: '2160p', // (New API)
    hd1440: '1440p',
    hd1080: '1080p',
    hd720: '720p',
    large: '480p',
    medium: '360p',
    small: '240p',
    tiny: '144p',
    auto: 'Auto'
  };

  /** @private */
  var numInstances = 0;

  // Extract the current origin (used for security)
  var ORIGIN = window.location.href.match(/http[s]?:\/\/[^\/]+/);
  ORIGIN = !ORIGIN || ORIGIN[0] === undefined ? undefined : ORIGIN[0];
  // ORIGIN = undefined is needed to support fetching file from device local storage

  return YouTube;
})(H5P.jQuery);

// Register video handler
H5P.videoHandlers = H5P.videoHandlers || [];
H5P.videoHandlers.push(H5P.VideoYouTube);
;/** @namespace H5P */
H5P.VideoPanopto = (function ($) {

  /**
   * Panopto video player for H5P.
   *
   * @class
   * @param {Array} sources Video files to use
   * @param {Object} options Settings for the player
   * @param {Object} l10n Localization strings
   */
  function Panopto(sources, options, l10n) {
    var self = this;

    self.volume = 100;
    self.toSeek = undefined;

    var player;
    var playbackRate = 1;
    let canHasAutoplay;
    var id = 'h5p-panopto-' + numInstances;
    numInstances++;
    let isLoaded = false;
    let isPlayerReady = false;

    var $wrapper = $('<div/>');
    var $placeholder = $('<div/>', {
      id: id,
      html: '<div>' + l10n.loading + '</div>'
    }).appendTo($wrapper);

    // Determine autoplay/play.
    try {
      if (document.featurePolicy.allowsFeature('autoplay') !== false) {
        canHasAutoplay = true;
      }
    }
    catch (err) {}

    /**
     * Use the Panopto API to create a new player
     *
     * @private
     */
    var create = function () {
      if (!$placeholder.is(':visible') || player !== undefined) {
        return;
      }

      if (window.EmbedApi === undefined) {
        // Load API first
        loadAPI(create);
        return;
      }

      var width = $wrapper.width();
      if (width < 200) {
        width = 200;
      }

      const videoId = getId(sources[0].path);
      player = new EmbedApi(id, {
        width: width,
        height: width * (9/16),
        serverName: videoId[0],
        sessionId: videoId[1],
        videoParams: { // Optional
          interactivity: 'none',
          showtitle: false,
          autohide: true,
          offerviewer: false,
          autoplay: false,
          showbrand: false,
          start: 0,
          hideoverlay: !options.controls,
        },
        events: {
          onIframeReady: function () {
            isPlayerReady = true;
            $placeholder.children(0).text('');
            if (options.autoplay && canHasAutoplay) {
              player.loadVideo();
              isLoaded = true;
            }

            self.trigger('containerLoaded');
            self.trigger('resize'); // Avoid black iframe if loading is slow
          },
          onReady: function () {
            self.videoLoaded = true;
            self.trigger('loaded');

            if (typeof self.oldTime === 'number') {
              self.seek(self.oldTime);
            }
            else if (typeof self.startAt === 'number' && self.startAt > 0) {
              self.seek(self.startAt);
            }
            if (player.hasCaptions()) {
              const captions = [];

              const captionTracks = player.getCaptionTracks();
              for (trackIndex in captionTracks) {
                captions.push(new H5P.Video.LabelValue(captionTracks[trackIndex], trackIndex));
              }

              // Select active track
              currentTrack = player.getSelectedCaptionTrack();
              currentTrack = captions[currentTrack] ? captions[currentTrack] : null;

              self.trigger('captions', captions);
            }
          },
          onStateChange: function (state) {
            if ([H5P.Video.PLAYING, H5P.Video.PAUSED].includes(state) && typeof self.seekToTime === 'number') {
              player.seekTo(self.seekToTime);
              delete self.seekToTime;
            }
            // since panopto has different load sequence in IV, need additional condition here
            if (self.WAS_RESET) {
              self.WAS_RESET = false;
            }

            // TODO: Playback rate fix for IE11?
            if (state > -1 && state < 4) {
              self.trigger('stateChange', state);
            }
          },
          onPlaybackRateChange: function () {
            self.trigger('playbackRateChange', self.getPlaybackRate());
          },
          onError: function (error) {
            if (error === ApiError.PlayWithSoundNotAllowed) {
              // pause and allow user to handle playing
              self.pause();

              self.unMute(); // because player is automuted on this error
            }
            else {
              self.trigger('error', l10n.unknownError);
            }
          },
          onLoginShown: function () {
            $placeholder.children().first().remove(); // Remove loading message
            self.trigger('loaded'); // Resize parent
          }
        }
      });
    };

    /**
     * Indicates if the video must be clicked for it to start playing.
     * This is always true for Panopto since all videos auto play.
     *
     * @public
     */
    self.pressToPlay = true;

    /**
    * Appends the video player to the DOM.
    *
    * @public
    * @param {jQuery} $container
    */
    self.appendTo = function ($container) {
      $container.addClass('h5p-panopto').append($wrapper);
      create();
    };

    /**
     * Get list of available qualities. Not available until after play.
     *
     * @public
     * @returns {Array}
     */
    self.getQualities = function () {
      // Not available for Panopto
    };

    /**
     * Get current playback quality. Not available until after play.
     *
     * @public
     * @returns {String}
     */
    self.getQuality = function () {
      // Not available for Panopto
    };

    /**
     * Set current playback quality. Not available until after play.
     * Listen to event "qualityChange" to check if successful.
     *
     * @public
     * @params {String} [quality]
     */
    self.setQuality = function (quality) {
      // Not available for Panopto
    };

    /**
     * Start the video.
     *
     * @public
     */
    self.play = function () {
      if (!player || !player.playVideo || !isPlayerReady) {
        return;
      }
      if (isLoaded || self.videoLoaded) {
        player.playVideo();
      }
      else {
        player.loadVideo(); // Loads and starts playing
        isLoaded = true;
      }
    };

    /**
     * Pause the video.
     *
     * @public
     */
    self.pause = function () {
      if (!player || !player.pauseVideo) {
        return;
      }
      try {
        player.pauseVideo();
      }
      catch (err) {
        // Swallow Panopto throwing an error. This has been seen in the authoring
        // tool if Panopto has been used inside Iv inside CP
      }
    };

    /**
     * Seek video to given time.
     *
     * @public
     * @param {Number} time
     */
    self.seek = function (time) {
      if (!player || !player.seekTo || !self.videoLoaded) {
        return;
      }
      if (!player.isReady) {
        self.seekToTime = time;
        return;
      }

      player.seekTo(time);

      if (self.WAS_RESET) {
        // need to check just to be sure, since state === 1 is unusable
        delete self.seekToTime;
        self.WAS_RESET = false;
      }
    };

    /**
     * Recreate player with initial time
     *
     * @public
     * @param {Number} time
     */
    self.resetPlayback = function (time) {
      if (player && player.isReady && self.videoLoaded) {
        self.seek(time);
        self.pause();
      }
      else {
        self.seekToTime = time;
      }
    }

    /**
     * Get elapsed time since video beginning.
     *
     * @public
     * @returns {Number}
     */
    self.getCurrentTime = function () {
      if (!player || !player.getCurrentTime) {
        return;
      }

      return player.getCurrentTime();
    };

    /**
     * Get total video duration time.
     *
     * @public
     * @returns {Number}
     */
    self.getDuration = function () {
      if (!player || !player.getDuration) {
        return;
      }

      return player.getDuration();
    };

    /**
     * Get percentage of video that is buffered.
     *
     * @public
     * @returns {Number} Between 0 and 100
     */
    self.getBuffered = function () {
      // Not available for Panopto
    };

    /**
     * Turn off video sound.
     *
     * @public
     */
    self.mute = function () {
      if (!player || !player.muteVideo) {
        return;
      }

      player.muteVideo();
    };

    /**
     * Turn on video sound.
     *
     * @public
     */
    self.unMute = function () {
      if (!player || !player.unmuteVideo) {
        return;
      }

      player.unmuteVideo();

      // The volume is set to 0 when the browser prevents autoplay,
      // causing there to be no sound despite unmuting
      self.setVolume(self.volume);
    };

    /**
     * Check if video sound is turned on or off.
     *
     * @public
     * @returns {Boolean}
     */
    self.isMuted = function () {
      if (!player || !player.isMuted) {
        return;
      }

      return player.isMuted();
    };

    /**
     * Check video is loaded and ready to play
     *
     * @public
     * @returns {Boolean}
     */
    self.isLoaded = function () {
      return isPlayerReady;
    };

    /**
     * Return the video sound level.
     *
     * @public
     * @returns {Number} Between 0 and 100.
     */
    self.getVolume = function () {
      if (!player || !player.getVolume) {
        return;
      }

      return player.getVolume() * 100;
    };

    /**
     * Set video sound level.
     *
     * @public
     * @param {Number} level Between 0 and 100.
     */
    self.setVolume = function (level) {
      if (!player || !player.setVolume) {
        return;
      }

      player.setVolume(level/100);
      self.volume = level;
    };

    /**
     * Get list of available playback rates.
     *
     * @public
     * @returns {Array} available playback rates
     */
    self.getPlaybackRates = function () {
      return [0.25, 0.5, 1, 1.25, 1.5, 2];
    };

    /**
     * Get current playback rate.
     *
     * @public
     * @returns {Number} such as 0.25, 0.5, 1, 1.25, 1.5 and 2
     */
    self.getPlaybackRate = function () {
      if (!player || !player.getPlaybackRate) {
        return;
      }

      return player.getPlaybackRate();
    };

    /**
     * Set current playback rate.
     * Listen to event "playbackRateChange" to check if successful.
     *
     * @public
     * @params {Number} suggested rate that may be rounded to supported values
     */
    self.setPlaybackRate = function (newPlaybackRate) {
      if (!player || !player.setPlaybackRate) {
        return;
      }

      player.setPlaybackRate(newPlaybackRate);
    };

    /**
     * Set current captions track.
     *
     * @param {H5P.Video.LabelValue} Captions track to show during playback
     */
    self.setCaptionsTrack = function (track) {
      if (!track) {
        player.disableCaptions();
        currentTrack = null;
      }
      else {
        player.enableCaptions(track.value + '');
        currentTrack = track;
      }
    };

    /**
     * Figure out which captions track is currently used.
     *
     * @return {H5P.Video.LabelValue} Captions track
     */
    self.getCaptionsTrack = function () {
      return currentTrack; // No function for getting active caption track?
    };

    // Respond to resize events by setting the player size.
    self.on('resize', function () {
      if (!$wrapper.is(':visible')) {
        return;
      }

      if (!player) {
        // Player isn't created yet. Try again.
        create();
        return;
      }
      
      $wrapper.removeAttr('font-size');

      let width = $wrapper[0].clientWidth;
      let height = options.fit ? $wrapper[0].clientHeight : (width * (9/16));
      
      const $iframe = $placeholder.children('iframe');
      if ($iframe.length) {
        $iframe.attr('width', width);
        $iframe.attr('height', height);
      }
      
      $wrapper.css({
        'font-size': 0
      });
    });

    let currentTrack;
  }

  /**
   * Check to see if we can play any of the given sources.
   *
   * @public
   * @static
   * @param {Array} sources
   * @returns {Boolean}
   */
  Panopto.canPlay = function (sources) {
    return getId(sources[0].path);
  };

  /**
   * Find id of YouTube video from given URL.
   *
   * @private
   * @param {String} url
   * @returns {String} Panopto video identifier
   */
  var getId = function (url) {
    const matches = url.match(/^[^\/]+:\/\/([^\/]*panopto\.[^\/]+)\/Panopto\/.+\?id=(.+)$/);
    if (matches && matches.length === 3) {
      return [matches[1], matches[2]];
    }
  };

  /**
   * Load the IFrame Player API asynchronously.
   */
  var loadAPI = function (loaded) {
    if (window.onPanoptoEmbedApiReady !== undefined) {
      // Someone else is loading, hook in
      var original = window.onPanoptoEmbedApiReady;
      window.onPanoptoEmbedApiReady = function (id) {
        loaded(id);
        original(id);
      };
    }
    else {
      // Load the API our self
      var tag = document.createElement('script');
      tag.src = 'https://developers.panopto.com/scripts/embedapi.min.js';
      var firstScriptTag = document.getElementsByTagName('script')[0];
      firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);
      window.onPanoptoEmbedApiReady = loaded;
    }
  };

  /** @private */
  var numInstances = 0;

  return Panopto;
})(H5P.jQuery);

// Register video handler
H5P.videoHandlers = H5P.videoHandlers || [];
H5P.videoHandlers.push(H5P.VideoPanopto);
;/** @namespace Echo */
H5P.VideoEchoVideo = (() => {

  let numInstances = 0;

  const CONTROLS_HEIGHT = 100;

  /**
   * EchoVideo video player for H5P.
   *
   * @class
   * @param {Array} sources Video files to use
   * @param {Object} options Settings for the player
   * @param {Object} l10n Localization strings
   */
  function EchoPlayer(sources, options, l10n) {
    // State variables for the Player.
    let player = undefined;
    let buffered = 0;
    let currentQuality;
    let trackOptions = [];
    let currentTime = 0;
    let duration = 0;
    let isMuted = false;
    let loadingComplete = false;
    let volume = 1;
    let playbackRate = 1;
    let qualities = [];
    let loadingFailedTimeout;
    let failedLoading = false;
    let ratio = 9 / 16;
    let currentState = H5P.Video.VIDEO_CUED;
    // Echo360 server doesn't sync seek time with regular play time fast enough
    let timelineUpdatesToSkip = 0;
    let timeUpdateTimeout;

    /*
     * Echo360 player does send time updates ~ 0.25 seconds by default and
     * ends playing the video without sending a final time update or an
     * Video Ended event. We take care of determining reaching the video end
     * ourselves.
     */
    const echoMinUncertaintyCompensationS = 0.3;
    const timelineUpdateDeltaSlackMS = 50;
    let echoUncertaintyCompensationS = echoMinUncertaintyCompensationS;
    let previousTickMS;

    // Player specific immutable variables.
    const LOADING_TIMEOUT_IN_SECONDS = 30;
    const id = `h5p-echo-${++numInstances}`;
    const instanceId = H5P.createUUID();
    const wrapperElement = document.createElement('div');

    const placeholderElement = document.createElement('div');
    placeholderElement.classList.add('h5p-video-loading');
    placeholderElement.setAttribute('style', 'height: 100%; min-height: 200px; display: block; z-index: 100; border: none;');
    placeholderElement.setAttribute('aria-label', l10n.loading);

    wrapperElement.setAttribute('id', id);
    wrapperElement.append(placeholderElement);

    /**
     * Remove all elements from the placeholder dom element.
     *
     * @private
     */
    const removeLoadingIndicator = () => {
      placeholderElement.replaceChildren();
    };

    /**
     * Generate an array of objects for use in a dropdown from the list of resolutions.
     * @private
     * @param {Array} qualityLevels - list of objects with supported qualities for the media
     * @returns {Array} list of objects with label and name properties
     */
    const mapQualityLevels = (qualityLevels) => {
      const qualities = qualityLevels.map((quality) => {
        return { label: quality.label.toLowerCase(), name: quality.value };
      });
      return qualities;
    };

    /**
     * Register event listeners on the given Echo player.
     *
     * @private
     * @param {HTMLElement} player
     */
    const registerEchoPlayerEventListeneners = (player) => {
      player.resolveLoading = null;
      player.loadingPromise = new Promise((resolve) => {
        player.resolveLoading = resolve;
      });
      player.onload = async () => {
        clearTimeout(loadingFailedTimeout);
        player.loadingPromise.then(async () => {
          this.trigger('ready');
          this.trigger('loaded');
          this.loadingComplete = true;
          this.trigger('resize');
          if (trackOptions.length) {
            this.trigger('captions', trackOptions);
          }

          const autoplayIsAllowed = !window.H5PEditor &&
            await H5P.Video.isAutoplayAllowed();
          if (options.autoplay && autoplayIsAllowed) {
            this.play();
          }

          return true;
        });
      };
      window.addEventListener('message', (event) => {
        let message = '';

        try {
          message = JSON.parse(event.data);
        }
        catch (e) {
          return;
        }
        if (
          message.context !== 'Echo360' || message.instanceId !== instanceId
        ) {
          return;
        }

        if (message.event === 'init') {
          // Set ratio if width and height is received from Echo360
          if (message.data.width && message.data.height) {
            // If controls are displayed we have to add a magic height to make it visible :(
            ratio = ((message.data.height + (options.controls ? CONTROLS_HEIGHT : 0)) / message.data.width);
          }

          duration = message.data.duration;
          this.setCurrentTime(message.data.currentTime ?? 0);

          textTracks = message.data.textTracks ?? [];
          if (message.data.captions) {
            trackOptions = textTracks.map((track) =>
              new H5P.Video.LabelValue(track.label, track.value)
            );
          }
          player.resolveLoading();

          // Player sends `init` event after rebuffering, unfortunately.
          if (!this.wasInitialized) {
            qualities = mapQualityLevels(message.data.qualityOptions);
            currentQuality = qualities[0].name;
            this.trigger('qualityChange', currentQuality);
          }

          this.trigger('resize');
          if (message.data.playing) {
            changeState(H5P.Video.PLAYING);
          }

          this.wasInitialized = true;
        }
        else if (message.event === 'timeline') {
          updateUncertaintyCompensation();

          duration = message.data.duration ?? this.getDuration();

          if (timelineUpdatesToSkip === 0) {
            this.setCurrentTime(message.data.currentTime ?? 0);
          }
          else {
            timelineUpdatesToSkip--;
          }

          /*
           * Should work, but it was better if the player itself clearly sent
           * the state (playing, paused, ended) instead of us having to infer.
           */
          const compensatedTime = this.getCurrentTime() +
            echoUncertaintyCompensationS * this.getPlaybackRate()

          if (
            currentState === H5P.Video.PLAYING &&
              Math.ceil(compensatedTime) >= duration
          ) {
            changeState(H5P.Video.ENDED);

            if (options.loop) {
              this.seek(0);
              this.play();
            }
            return;
          }

          if (message.data.playing) {
            timeUpdate(currentTime);
            changeState(H5P.Video.PLAYING);
          }
          else if (currentState === H5P.Video.PLAYING) {
            // Condition prevents video to be paused on startup
            changeState(H5P.Video.PAUSED);
            window.clearTimeout(timeUpdateTimeout);
          }
        }
      });
    };

    /**
     * Update the uncertainty compensation value.
     * Computes the delta time between the last two timeline events sent by the
     * Echo360 player and updates the compensation value.
     */
    const updateUncertaintyCompensation = () => {
      if (currentState === H5P.Video.PLAYING) {
        const time = Date.now();

        if (previousTickMS) {
          echoUncertaintyCompensationS = Math.max(
            echoMinUncertaintyCompensationS,
            (time - previousTickMS + timelineUpdateDeltaSlackMS) /
              1000
          )
        } else {
          echoUncertaintyCompensationS = echoMinUncertaintyCompensationS;
        }

        previousTickMS = time;
      }
      else {
        delete previousTickMS;
      }
    }

    /**
     * Change state of the player.
     * @param {number} state State id (H5P.Video[statename]).
     */
    const changeState = (state) => {
      if (state !== currentState) {
        currentState = state;
        this.trigger('stateChange', state);
      }
    };

    /**
     * Determine if the element is visible by computing the styles.
     *
     * @private
     * @param {HTMLElement} node - the element to check.
     * @returns {Boolean} true if it is visible.
     */
    const isNodeVisible = (node) => {
      let style = window.getComputedStyle(node);

      if (node.offsetWidth === 0) {
        return false;
      }

      return ((style.display !== 'none') && (style.visibility !== 'hidden'));
    };

    const timeUpdate = (time) => {
      window.clearTimeout(timeUpdateTimeout);

      this.lastTimeUpdate = Date.now();

      timeUpdateTimeout = window.setTimeout(() => {
        if (currentState !== H5P.Video.PLAYING) {
          return;
        }

        const delta = (Date.now() - this.lastTimeUpdate) * this.getPlaybackRate();
        this.setCurrentTime(currentTime + delta / 1000);
        timeUpdate(currentTime);
      }, 40); // 25 fps
    }

    /**
     * Create a new player by embedding an iframe.
     *
     * @private
     * @returns {Promise}
     */
    const createEchoPlayer = async () => {
      if (!isNodeVisible(placeholderElement) || player !== undefined) {
        return;
      }
      // Since the SDK is loaded asynchronously below, explicitly set player to
      // null (unlike undefined) which indicates that creation has begun. This
      // allows the guard statement above to be hit if this function is called
      // more than once.
      player = null;
      let queryString = '?';

      queryString += `instanceId=${instanceId}&`;

      if (options.controls) {
        queryString += 'controls=true&';
      }
      if (options.disableFullscreen) {
        queryString += 'disableFullscreen=true&';
      }
      if (options.deactivateSound) {
        queryString += 'deactivateSound=true&';
      }
      if (options.startAt) {
        queryString += `startTimeMillis=${Math.round(options.startAt * 1000)}&`;
      }

      wrapperElement.innerHTML = `<iframe src="${sources[0].path}${queryString}" style="display: inline-block; width: 100%; height: 100%;" allow="autoplay; fullscreen" frameborder="0" scrolling="no"></iframe>`;
      player = wrapperElement.firstChild;
      // Create a new player
      registerEchoPlayerEventListeneners(player);
      loadingFailedTimeout = setTimeout(() => {
        failedLoading = true;
        removeLoadingIndicator();
        wrapperElement.innerHTML = `<p class="echo-failed-loading">${l10n.unknownError}</p>`;
        wrapperElement.style.cssText = 'width: null; height: null;';
        this.trigger('resize');
        this.trigger('error', l10n.unknownError);
      }, LOADING_TIMEOUT_IN_SECONDS * 1000);
    };

    /**
     * Appends the video player to the DOM.
     *
     * @public
     * @param {jQuery} $container
     */
    this.appendTo = ($container) => {
      $container.addClass('h5p-echo').append(wrapperElement);
      createEchoPlayer();
    };

    /**
     * Determine if the video has loaded.
     *
     * @public
     * @returns {Boolean}
     */
    this.isLoaded = () => {
      return loadingComplete;
    };

    /**
     * Get list of available qualities.
     *
     * @public
     * @returns {Array}
     */
    this.getQualities = () => {
      return qualities;
    };

    /**
     * Get the current quality.
     *
     * @public
     * @returns {String} Current quality identifier
     */
    this.getQuality = () => {
      return currentQuality;
    };

    /**
     * Set the playback quality.
     *
     * @public
     * @param {String} quality
     */
    this.setQuality = async (quality) => {
      this.post('quality', quality);
      currentQuality = quality;
      this.trigger('qualityChange', currentQuality);
    };

    /**
     * Start the video.
     *
     * @public
     */
    this.play = () => {
      if (!player) {
        this.on('ready', this.play);
        return;
      }
      this.post('play', 0);
    };

    /**
     * Pause the video.
     *
     * @public
     */
    this.pause = () => {
      // Compensate for Echo360's delayed time updates
      timelineUpdatesToSkip = 1;
      this.post('pause', 0);
    };

    /**
     * Seek video to given time.
     *
     * @public
     * @param {Number} time
     */
    this.seek = (time) => {
      this.post('seek', time);
      this.setCurrentTime(time);
      // Compensate for Echo360's delayed time updates
      timelineUpdatesToSkip = 1;
    };

    /**
     * Post a window message to the iframe.
     *
     * @public
     * @param event
     * @param data
     */
    this.post = (event, data) => {
      player?.contentWindow?.postMessage(
        JSON.stringify({
          event: event,
          context: 'Echo360',
          instanceId: instanceId,
          data: data
        }),
        '*'
      );
    };

    /**
     * Return the current play position.
     *
     * @public
     * @returns {Number} Seconds elapsed since beginning of video
     */
    this.getCurrentTime = () => {
      return currentTime;
    };

    /**
     * Set current time.
     * @param {number} timeS Time in seconds.
     */
    this.setCurrentTime = (timeS) => {
      currentTime = timeS;
    }

    /**
     * Return the video duration.
     *
     * @public
     * @returns {?Number} Video duration in seconds
     */
    this.getDuration = () => {
      if (duration > 0) {
        return duration;
      }
      return null;
    };

    /**
     * Get percentage of video that is buffered.
     *
     * @public
     * @returns {Number} Between 0 and 100
     */
    this.getBuffered = () => {
      return buffered;
    };

    /**
     * Mute the video.
     *
     * @public
     */
    this.mute = () => {
      this.post('mute', 0);
      isMuted = true;
    };

    /**
     * Unmute the video.
     *
     * @public
     */
    this.unMute = () => {
      this.post('unmute', 0);
      isMuted = false;
    };

    /**
     * Whether the video is muted.
     *
     * @public
     * @returns {Boolean} True if the video is muted, false otherwise
     */
    this.isMuted = () => {
      return isMuted;
    };

    /**
     * Get the video player's current sound volume.
     *
     * @public
     * @returns {Number} Between 0 and 100.
     */
    this.getVolume = () => {
      return volume;
    };

    /**
     * Set the video player's sound volume.
     *
     * @public
     * @param {Number} level
     */
    this.setVolume = (level) => {
      this.post('volume', level);
      volume = level;
    };

    /**
     * Get list of available playback rates.
     *
     * @public
     * @returns {Array} Available playback rates
     */
    this.getPlaybackRates = () => {
      return [0.25, 0.5, 0.75, 1, 1.25, 1.5, 1.75, 2];
    };

    /**
     * Get the current playback rate.
     *
     * @public
     * @returns {Number} e.g. 0.5, 1, 1.5 or 2
     */
    this.getPlaybackRate = () => {
      return playbackRate;
    };

    /**
     * Set the current playback rate.
     *
     * @public
     * @param {Number} rate Must be one of available rates from getPlaybackRates
     */
    this.setPlaybackRate = async (rate) => {
      const echoRate = parseFloat(rate);
      this.post('playbackrate', echoRate);
      playbackRate = rate;
      this.trigger('playbackRateChange', rate);
    };

    /**
     * Set current captions track.
     *
     * @public
     * @param {H5P.Video.LabelValue} track Captions to display
     */
    this.setCaptionsTrack = (track) => {
      const echoCaption = trackOptions.find(
        (trackItem) => track?.value === trackItem.value
      );

      trackOptions.forEach(trackItem => {
        trackItem.mode = (trackItem === echoCaption) ? 'showing' : 'disabled';
      });

      this.post('captions', echoCaption ? echoCaption.value : 'off');
    };

    /**
     * Get current captions track.
     *
     * @public
     * @returns {H5P.Video.LabelValue|null} Current captions track.
     */
    this.getCaptionsTrack = () => {
      return trackOptions.find(
        (trackItem) => trackItem.mode === 'showing'
      ) ?? null;
    };

    this.on('resize', () => {
      if (failedLoading || !isNodeVisible(wrapperElement)) {
        return;
      }
      if (player === undefined) {
        // Player isn't created yet. Try again.
        createEchoPlayer();
        return;
      }
      // Use as much space as possible
      wrapperElement.style.cssText = 'width: 100%; height: 100%;';
      const width = wrapperElement.clientWidth;
      const height = options.fit ? wrapperElement.clientHeight : (width * (ratio));
      // Validate height before setting
      if (height > 0) {
        // Set size
        wrapperElement.style.cssText = 'width: ' + width + 'px; height: ' + height + 'px;';
      }
    });
  }

  /**
   * Find id of video from given URL.
   *
   * @private
   * @param {String} url
   * @returns {String} Echo video identifier
   */
  const getId = (url) => {
    const matches = url.match(/^[^/]+:\/\/(echo360[^/]+)\/media\/([^/]+)\/h5p.*$/i);
    if (matches && matches.length === 3) {
      return [matches[2], matches[2]];
    }
  };

  /**
   * Check to see if we can play any of the given sources.
   *
   * @public
   * @static
   * @param {Array} sources
   * @returns {Boolean}
   */
  EchoPlayer.canPlay = (sources) => {
    return getId(sources[0].path);
  };
  return EchoPlayer;
})(H5P.jQuery);

// Register video handler
H5P.videoHandlers = H5P.videoHandlers || [];
H5P.videoHandlers.push(H5P.VideoEchoVideo);
;/** @namespace H5P */
H5P.VideoHtml5 = (function ($) {

  /**
   * HTML5 video player for H5P.
   *
   * @class
   * @param {Array} sources Video files to use
   * @param {Object} options Settings for the player
   * @param {Object} l10n Localization strings
   */
  function Html5(sources, options, l10n) {
    var self = this;

    /**
     * Small helper to ensure all video sources get the same cache buster.
     *
     * @private
     * @param {Object} source
     * @return {string}
     */
    const getCrossOriginPath = function (source) {
      let path = H5P.getPath(source.path, self.contentId);
      if (video.crossOrigin !== null && H5P.addQueryParameter && H5PIntegration.crossoriginCacheBuster) {
        path = H5P.addQueryParameter(path, H5PIntegration.crossoriginCacheBuster);
      }
      return path
    };


    /**
     * Register track to video
     *
     * @param {Object} trackData Track object
     * @param {string} trackData.kind Kind of track
     * @param {Object} trackData.track Source path
     * @param {string} [trackData.label] Label of track
     * @param {string} [trackData.srcLang] Language code
     */
    const addTrack = function (trackData) {
      // Skip invalid tracks
      if (!trackData.kind || !trackData.track.path) {
        return;
      }

      var track = document.createElement('track');
      track.kind = trackData.kind;
      track.src = getCrossOriginPath(trackData.track); // Uses same crossOrigin as parent. You cannot mix.
      if (trackData.label) {
        track.label = trackData.label;
      }

      if (trackData.srcLang) {
        track.srcLang = trackData.srcLang;
      }

      return track;
    };

    /**
     * Small helper to set the inital video source.
     * Useful if some of the loading happens asynchronously.
     * NOTE: Setting the crossOrigin must happen before any of the
     * sources(poster, tracks etc.) are loaded
     *
     * @private
     */
    const setInitialSource = function () {
      if (qualities[currentQuality] === undefined) {
        return;
      }

      if (H5P.setSource !== undefined) {
        H5P.setSource(video, qualities[currentQuality].source, self.contentId)
      }
      else {
        // Backwards compatibility (H5P < v1.22)
        const srcPath = H5P.getPath(qualities[currentQuality].source.path, self.contentId);
        if (H5P.getCrossOrigin !== undefined) {
          var crossOrigin = H5P.getCrossOrigin(srcPath);
          video.setAttribute('crossorigin', crossOrigin !== null ? crossOrigin : 'anonymous');
        }
        video.src = srcPath;
      }

      // Add poster if provided
      if (options.poster) {
        video.poster = getCrossOriginPath(options.poster); // Uses same crossOrigin as parent. You cannot mix.
      }

      // Register tracks
      options.tracks.forEach(function (track, i) {
        var trackElement = addTrack(track);
        if (i === 0) {
          trackElement.default = true;
        }
        if (trackElement) {
          video.appendChild(trackElement);
        }
      });
    };

    /**
     * Displayed when the video is buffering
     * @private
     */
    var $throbber = $('<div/>', {
      'class': 'h5p-video-loading'
    });

    /**
     * Used to display error messages
     * @private
     */
    var $error = $('<div/>', {
      'class': 'h5p-video-error'
    });

    /**
     * Keep track of current state when changing quality.
     * @private
     */
    var stateBeforeChangingQuality;
    var currentTimeBeforeChangingQuality;

    /**
     * Avoids firing the same event twice.
     * @private
     */
    var lastState;

    /**
     * Keeps track whether or not the video has been loaded.
     * @private
     */
    var isLoaded = false;

    /**
     *
     * @private
     */
    var playbackRate = 1;
    var skipRateChange = false;

    // Create player
    var video = document.createElement('video');

    // Sort sources into qualities
    var qualities = getQualities(sources, video);
    var currentQuality;

    numQualities = 0;
    for (let quality in qualities) {
      numQualities++;
    }

    if (numQualities > 1 && H5P.VideoHtml5.getExternalQuality !== undefined) {
      H5P.VideoHtml5.getExternalQuality(sources, function (chosenQuality) {
        if (qualities[chosenQuality] !== undefined) {
          currentQuality = chosenQuality;
        }
        setInitialSource();
      });
    }
    else {
      // Select quality and source
      currentQuality = getPreferredQuality();
      if (currentQuality === undefined || qualities[currentQuality] === undefined) {
        // No preferred quality, pick the first.
        for (currentQuality in qualities) {
          if (qualities.hasOwnProperty(currentQuality)) {
            break;
          }
        }
      }
      setInitialSource();
    }

    // Setting webkit-playsinline, which makes iOS 10 beeing able to play video
    // inside browser.
    video.setAttribute('webkit-playsinline', '');
    video.setAttribute('playsinline', '');
    video.setAttribute('preload', 'metadata');

    // Remove buttons in Chrome's video player:
    let controlsList = 'nodownload';
    if (options.disableFullscreen) {
      controlsList += ' nofullscreen';
    }
    if (options.disableRemotePlayback) {
      controlsList += ' noremoteplayback';
    }
    video.setAttribute('controlsList', controlsList);

    // Remove picture in picture as it interfers with other video players
    video.disablePictureInPicture = true;

    // Set options
    video.disableRemotePlayback = (options.disableRemotePlayback ? true : false);
    video.controls = (options.controls ? true : false);
    // Hardcoded autoplay to false to avoid playing videos on init
    video.autoplay = false;
    video.loop = (options.loop ? true : false);
    video.className = 'h5p-video';
    video.style.display = 'block';

    if (options.fit) {
      // Style is used since attributes with relative sizes aren't supported by IE9.
      video.style.width = '100%';
      video.style.height = '100%';
    }

    /**
     * Helps registering events.
     *
     * @private
     * @param {String} native Event name
     * @param {String} h5p Event name
     * @param {String} [arg] Optional argument
     */
    var mapEvent = function (native, h5p, arg) {
      video.addEventListener(native, function () {
        switch (h5p) {
          case 'loaded':
            isLoaded = true;

            if (stateBeforeChangingQuality !== undefined) {
              return; // Avoid loaded event when changing quality.
            }

            // Remove any errors
            if ($error.is(':visible')) {
              $error.remove();
            }

            if (OLD_ANDROID_FIX) {
              var andLoaded = function () {
                video.removeEventListener('durationchange', andLoaded, false);
                // On Android seeking isn't ready until after play.
                self.trigger(h5p);
              };
              video.addEventListener('durationchange', andLoaded, false);
              return;
            }

            if (video.poster) {
              $(video).one('play', function () {
                self.seek(self.getCurrentTime() || options.startAt);
              });
            }
            else {
              self.seek(options.startAt);
            }

            break;

          case 'error':
            // Handle error and get message.
            arg = error(arguments[0], arguments[1]);
            break;

          case 'playbackRateChange':

            // Fix for keeping playback rate in IE11
            if (skipRateChange) {
              skipRateChange = false;
              return; // Avoid firing event when changing back
            }
            if (H5P.Video.IE11_PLAYBACK_RATE_FIX && playbackRate != video.playbackRate) { // Intentional
              // Prevent change in playback rate not triggered by the user
              video.playbackRate = playbackRate;
              skipRateChange = true;
              return;
            }
            // End IE11 fix

            arg = self.getPlaybackRate();
            break;
        }
        self.trigger(h5p, arg);
      }, false);
    };

    /**
     * Handle errors from the video player.
     *
     * @private
     * @param {Object} code Error
     * @param {String} [message]
     * @returns {String} Human readable error message.
     */
    var error = function (code, message) {
      if (code instanceof Event) {

        // No error code
        if (!code.target.error) {
          return '';
        }

        switch (code.target.error.code) {
          case MediaError.MEDIA_ERR_ABORTED:
            message = l10n.aborted;
            break;
          case MediaError.MEDIA_ERR_NETWORK:
            message = l10n.networkFailure;
            break;
          case MediaError.MEDIA_ERR_DECODE:
            message = l10n.cannotDecode;
            break;
          case MediaError.MEDIA_ERR_SRC_NOT_SUPPORTED:
            message = l10n.formatNotSupported;
            break;
          case MediaError.MEDIA_ERR_ENCRYPTED:
            message = l10n.mediaEncrypted;
            break;
        }
      }
      if (!message) {
        message = l10n.unknownError;
      }

      // Hide throbber
      $throbber.remove();

      // Display error message to user
      $error.text(message).insertAfter(video);

      // Pass message to our error event
      return message;
    };

    /**
     * Appends the video player to the DOM.
     *
     * @public
     * @param {jQuery} $container
     */
    self.appendTo = function ($container) {
      $container.append(video);
    };

    /**
     * Get list of available qualities. Not available until after play.
     *
     * @public
     * @returns {Array}
     */
    self.getQualities = function () {
      // Create reverse list
      var options = [];
      for (var q in qualities) {
        if (qualities.hasOwnProperty(q)) {
          options.splice(0, 0, {
            name: q,
            label: qualities[q].label
          });
        }
      }

      if (options.length < 2) {
        // Do not return if only one quality.
        return;
      }

      return options;
    };

    /**
     * Get current playback quality. Not available until after play.
     *
     * @public
     * @returns {String}
     */
    self.getQuality = function () {
      return currentQuality;
    };

    /**
     * Set current playback quality. Not available until after play.
     * Listen to event "qualityChange" to check if successful.
     *
     * @public
     * @params {String} [quality]
     */
    self.setQuality = function (quality) {
      if (qualities[quality] === undefined || quality === currentQuality) {
        return; // Invalid quality
      }

      // Keep track of last choice
      setPreferredQuality(quality);

      // Avoid multiple loaded events if changing quality multiple times.
      if (!stateBeforeChangingQuality) {
        // Keep track of last state
        stateBeforeChangingQuality = lastState;

        // Keep track of current time
        currentTimeBeforeChangingQuality = video.currentTime;

        // Seek and start video again after loading.
        var loaded = function () {
          video.removeEventListener('loadedmetadata', loaded, false);
          if (OLD_ANDROID_FIX) {
            var andLoaded = function () {
              video.removeEventListener('durationchange', andLoaded, false);
              // On Android seeking isn't ready until after play.
              self.seek(currentTimeBeforeChangingQuality);
            };
            video.addEventListener('durationchange', andLoaded, false);
          }
          else {
            // Seek to current time.
            self.seek(currentTimeBeforeChangingQuality);
          }

          // Always play to get image.
          video.play();

          if (stateBeforeChangingQuality !== H5P.Video.PLAYING) {
            // Do not resume playing
            video.pause();
          }

          // Done changing quality
          stateBeforeChangingQuality = undefined;

          // Remove any errors
          if ($error.is(':visible')) {
            $error.remove();
          }
        };
        video.addEventListener('loadedmetadata', loaded, false);
      }

      // Keep track of current quality
      currentQuality = quality;
      self.trigger('qualityChange', currentQuality);

      // Display throbber
      self.trigger('stateChange', H5P.Video.BUFFERING);

      // Change source
      video.src = getCrossOriginPath(qualities[quality].source); // (iPad does not support #t=).
      // Note: Optional tracks use same crossOrigin as the original. You cannot mix.

      // Remove poster so it will not show during quality change
      video.removeAttribute('poster');
    };

    /**
     * Starts the video.
     *
     * @public
     * @return {Promise|undefined} May return a Promise that resolves when
     * play has been processed.
     */
    self.play = function () {
      if ($error.is(':visible')) {
        return;
      }

      if (!isLoaded) {
        // Make sure video is loaded before playing
        video.load();

        video.addEventListener('loadeddata', function() {
          video.play();
        }, false);
      }
      else {
        return video.play();
      }
    };

    /**
     * Pauses the video.
     *
     * @public
     */
    self.pause = function () {
      video.pause();
    };

    /**
     * Seek video to given time.
     *
     * @public
     * @param {Number} time
     */
    self.seek = function (time) {
      video.currentTime = time;
      // Use canplaythrough for IOs devices
      // Use loadedmetadata for all other devices.
      const eventName = navigator.userAgent.match(/iPad|iPod|iPhone/i) ? "canplaythrough" : "loadedmetadata";
      function seekTo() {
        video.currentTime = time;
        video.removeEventListener(eventName, seekTo);
      };

      if (video.readyState === 4) {
        seekTo();
      }
      else {
        video.addEventListener(eventName, seekTo);
      }
    };

    /**
     * Get elapsed time since video beginning.
     *
     * @public
     * @returns {Number}
     */
    self.getCurrentTime = function () {
      return video.currentTime;
    };

    /**
     * Get total video duration time.
     *
     * @public
     * @returns {Number}
     */
    self.getDuration = function () {
      if (isNaN(video.duration)) {
        return;
      }

      return video.duration;
    };

    /**
     * Get percentage of video that is buffered.
     *
     * @public
     * @returns {Number} Between 0 and 100
     */
    self.getBuffered = function () {
      // Find buffer currently playing from
      var buffered = 0;
      for (var i = 0; i < video.buffered.length; i++) {
        var from = video.buffered.start(i);
        var to = video.buffered.end(i);

        if (video.currentTime > from && video.currentTime < to) {
          buffered = to;
          break;
        }
      }

      // To percentage
      return buffered ? (buffered / video.duration) * 100 : 0;
    };

    /**
     * Turn off video sound.
     *
     * @public
     */
    self.mute = function () {
      video.muted = true;
    };

    /**
     * Turn on video sound.
     *
     * @public
     */
    self.unMute = function () {
      video.muted = false;
    };

    /**
     * Check if video sound is turned on or off.
     *
     * @public
     * @returns {Boolean}
     */
    self.isMuted = function () {
      return video.muted;
    };

    /**
     * Returns the video sound level.
     *
     * @public
     * @returns {Number} Between 0 and 100.
     */
    self.getVolume = function () {
      return video.volume * 100;
    };

    /**
     * Set video sound level.
     *
     * @public
     * @param {Number} level Between 0 and 100.
     */
    self.setVolume = function (level) {
      video.volume = level / 100;
    };

    /**
     * Get list of available playback rates.
     *
     * @public
     * @returns {Array} available playback rates
     */
    self.getPlaybackRates = function () {
      /*
       * not sure if there's a common rule about determining good speeds
       * using Google's standard options via a constant for setting
       */
      var playbackRates = PLAYBACK_RATES;

      return playbackRates;
    };

    /**
     * Get current playback rate.
     *
     * @public
     * @returns {Number} such as 0.25, 0.5, 1, 1.25, 1.5 and 2
     */
    self.getPlaybackRate = function () {
      return video.playbackRate;
    };

    /**
     * Set current playback rate.
     * Listen to event "playbackRateChange" to check if successful.
     *
     * @public
     * @params {Number} suggested rate that may be rounded to supported values
     */
    self.setPlaybackRate = function (newPlaybackRate) {
      playbackRate = newPlaybackRate;
      video.playbackRate = newPlaybackRate;
    };

    /**
     * Set current captions track.
     *
     * @param {H5P.Video.LabelValue} Captions track to show during playback
     */
    self.setCaptionsTrack = function (track) {
      for (var i = 0; i < video.textTracks.length; i++) {
        video.textTracks[i].mode = (track && track.value === i ? 'showing' : 'disabled');
      }
    };

    /**
     * Figure out which captions track is currently used.
     *
     * @return {H5P.Video.LabelValue} Captions track
     */
    self.getCaptionsTrack = function () {
      for (var i = 0; i < video.textTracks.length; i++) {
        if (video.textTracks[i].mode === 'showing') {
          return new H5P.Video.LabelValue(video.textTracks[i].label, i);
        }
      }

      return null;
    };

    // Register event listeners
    mapEvent('ended', 'stateChange', H5P.Video.ENDED);
    mapEvent('playing', 'stateChange', H5P.Video.PLAYING);
    mapEvent('pause', 'stateChange', H5P.Video.PAUSED);
    mapEvent('waiting', 'stateChange', H5P.Video.BUFFERING);
    mapEvent('loadedmetadata', 'loaded');
    mapEvent('canplay', 'canplay');
    mapEvent('error', 'error');
    mapEvent('ratechange', 'playbackRateChange');

    if (!video.controls) {
      // Disable context menu(right click) to prevent controls.
      video.addEventListener('contextmenu', function (event) {
        event.preventDefault();
      }, false);
    }

    // Display throbber when buffering/loading video.
    self.on('stateChange', function (event) {
      var state = event.data;
      lastState = state;
      if (state === H5P.Video.BUFFERING) {
        $throbber.insertAfter(video);
      }
      else {
        $throbber.remove();
      }
    });

    // Load captions after the video is loaded
    self.on('loaded', function () {
      nextTick(function () {
        var textTracks = [];
        for (var i = 0; i < video.textTracks.length; i++) {
          textTracks.push(new H5P.Video.LabelValue(video.textTracks[i].label, i));
        }
        if (textTracks.length) {
          self.trigger('captions', textTracks);
        }
      });
    });

    // Alternative to 'canplay' event
    /*self.on('resize', function () {
      if (video.offsetParent === null) {
        return;
      }

      video.style.width = '100%';
      video.style.height = '100%';

      var width = video.clientWidth;
      var height = options.fit ? video.clientHeight : (width * (video.videoHeight / video.videoWidth));

      video.style.width = width + 'px';
      video.style.height = height + 'px';
    });*/

    // Video controls are ready
    nextTick(function () {
      self.trigger('ready');
    });

    /**
     * Check video is loaded and ready play.
     *
     * @public
     * @param {Boolean}
     */
    self.isLoaded = function () {
      return isLoaded;
    };
  }

  /**
   * Check to see if we can play any of the given sources.
   *
   * @public
   * @static
   * @param {Array} sources
   * @returns {Boolean}
   */
  Html5.canPlay = function (sources) {
    var video = document.createElement('video');
    if (video.canPlayType === undefined) {
      return false; // Not supported
    }

    // Cycle through sources
    for (var i = 0; i < sources.length; i++) {
      var type = getType(sources[i]);
      if (type && video.canPlayType(type) !== '') {
        // We should be able to play this
        return true;
      }
    }

    return false;
  };

  /**
   * Find source type.
   *
   * @private
   * @param {Object} source
   * @returns {String}
   */
  var getType = function (source) {
    var type = source.mime;
    if (!type) {
      // Try to get type from URL
      var matches = source.path.match(/\.(\w+)$/);
      if (matches && matches[1]) {
        type = 'video/' + matches[1];
      }
    }

    if (type && source.codecs) {
      // Add codecs
      type += '; codecs="' + source.codecs + '"';
    }

    return type;
  };

  /**
   * Sort sources into qualities.
   *
   * @private
   * @static
   * @param {Array} sources
   * @param {Object} video
   * @returns {Object} Quality mapping
   */
  var getQualities = function (sources, video) {
    var qualities = {};
    var qualityIndex = 1;
    var lastQuality;

    // Cycle through sources
    for (var i = 0; i < sources.length; i++) {
      var source = sources[i];

      // Find and update type.
      var type = source.type = getType(source);

      // Check if we support this type
      var isPlayable = type && (type === 'video/unknown' || video.canPlayType(type) !== '');
      if (!isPlayable) {
        continue; // We cannot play this source
      }

      if (source.quality === undefined) {
        /**
         * No quality metadata. Create a quality tag to separate multiple sources of the same type,
         * e.g. if two mp4 files with different quality has been uploaded
         */

        if (lastQuality === undefined || qualities[lastQuality].source.type === type) {
          // Create a new quality tag
          source.quality = {
            name: 'q' + qualityIndex,
            label: (source.metadata && source.metadata.qualityName) ? source.metadata.qualityName : 'Quality ' + qualityIndex // TODO: l10n
          };
          qualityIndex++;
        }
        else {
          /**
           * Assumes quality already exists in a different format.
           * Uses existing label for this quality.
           */
          source.quality = qualities[lastQuality].source.quality;
        }
      }

      // Log last quality
      lastQuality = source.quality.name;

      // Look to see if quality exists
      var quality = qualities[lastQuality];
      if (quality) {
        // We have a source with this quality. Check if we have a better format.
        if (source.mime.split('/')[1] === PREFERRED_FORMAT) {
          quality.source = source;
        }
      }
      else {
        // Add new source with quality.
        qualities[source.quality.name] = {
          label: source.quality.label,
          source: source
        };
      }
    }

    return qualities;
  };

  /**
   * Set preferred video quality.
   *
   * @private
   * @static
   * @param {String} quality Index of preferred quality
   */
  var setPreferredQuality = function (quality) {
    try {
      localStorage.setItem('h5pVideoQuality', quality);
    }
    catch (err) {
      console.warn('Unable to set preferred video quality, localStorage is not available.');
    }
  };

  /**
   * Get preferred video quality.
   *
   * @private
   * @static
   * @returns {String} Index of preferred quality
   */
  var getPreferredQuality = function () {
    // First check localStorage
    let quality;
    try {
      quality = localStorage.getItem('h5pVideoQuality');
    }
    catch (err) {
      console.warn('Unable to retrieve preferred video quality from localStorage.');
    }
    if (!quality) {
      try {
        // The fallback to old cookie solution
        var settings = document.cookie.split(';');
        for (var i = 0; i < settings.length; i++) {
          var setting = settings[i].split('=');
          if (setting[0] === 'H5PVideoQuality') {
            quality = setting[1];
            break;
          }
        }
      }
      catch (err) {
        console.warn('Unable to retrieve preferred video quality from cookie.');
      }
    }
    return quality;
  };

  /**
   * Helps schedule a task for the next tick.
   * @param {function} task
   */
  var nextTick = function (task) {
    setTimeout(task, 0);
  };

  /** @constant {Boolean} */
  var OLD_ANDROID_FIX = false;

  /** @constant {Boolean} */
  var PREFERRED_FORMAT = 'mp4';

  /** @constant {Object} */
  var PLAYBACK_RATES = [0.25, 0.5, 1, 1.25, 1.5, 2];

  if (navigator.userAgent.indexOf('Android') !== -1) {
    // We have Android, check version.
    var version = navigator.userAgent.match(/AppleWebKit\/(\d+\.?\d*)/);
    if (version && version[1] && Number(version[1]) <= 534.30) {
      // Include fix for devices running the native Android browser.
      // (We don't know when video was fixed, so the number is just the lastest
      // native android browser we found.)
      OLD_ANDROID_FIX = true;
    }
  }
  else {
    if (navigator.userAgent.indexOf('Chrome') !== -1) {
      // If we're using chrome on a device that isn't Android, prefer the webm
      // format. This is because Chrome has trouble with some mp4 codecs.
      PREFERRED_FORMAT = 'webm';
    }
  }

  return Html5;
})(H5P.jQuery);

// Register video handler
H5P.videoHandlers = H5P.videoHandlers || [];
H5P.videoHandlers.push(H5P.VideoHtml5);
;/** @namespace H5P */
H5P.Video = (function ($, ContentCopyrights, MediaCopyright, handlers) {

  /**
   * The ultimate H5P video player!
   *
   * @class
   * @param {Object} parameters Options for this library.
   * @param {Object} parameters.visuals Visual options
   * @param {Object} parameters.playback Playback options
   * @param {Object} parameters.a11y Accessibility options
   * @param {Boolean} [parameters.startAt] Start time of video
   * @param {Number} id Content identifier
   * @param {Object} [extras] Extra parameters.
   */
  function Video(parameters, id, extras = {}) {
    var self = this;
    self.oldTime = extras.previousState?.time;
    self.contentId = id;
    self.WAS_RESET = false;
    self.startAt = parameters.startAt || 0;

    // Ref youtube.js - ipad & youtube - issue
    self.pressToPlay = false;

    // Reference to the handler
    var handlerName = '';

    // Initialize event inheritance
    H5P.EventDispatcher.call(self);

    // Default language localization
    parameters = $.extend(true, parameters, {
      l10n: {
        name: 'Video',
        loading: 'Video player loading...',
        noPlayers: 'Found no video players that supports the given video format.',
        noSources: 'Video source is missing.',
        aborted: 'Media playback has been aborted.',
        networkFailure: 'Network failure.',
        cannotDecode: 'Unable to decode media.',
        formatNotSupported: 'Video format not supported.',
        mediaEncrypted: 'Media encrypted.',
        unknownError: 'Unknown error.',
        vimeoPasswordError: 'Password-protected Vimeo videos are not supported.',
        vimeoPrivacyError: 'The Vimeo video cannot be used due to its privacy settings.',
        vimeoLoadingError: 'The Vimeo video could not be loaded.',
        invalidYtId: 'Invalid YouTube ID.',
        unknownYtId: 'Unable to find video with the given YouTube ID.',
        restrictedYt: 'The owner of this video does not allow it to be embedded.'
      }
    });

    parameters.a11y = parameters.a11y || [];
    parameters.playback = parameters.playback || {};
    parameters.visuals = $.extend(
      true, { disableFullscreen: false }, parameters.visuals
    );

    /** @private */
    var sources = [];
    if (parameters.sources) {
      for (var i = 0; i < parameters.sources.length; i++) {
        // Clone to avoid changing of parameters.
        var source = $.extend(true, {}, parameters.sources[i]);

        // Create working URL without html entities.
        source.path = $cleaner.html(source.path).text();
        sources.push(source);
      }
    }

    /** @private */
    var tracks = [];
    parameters.a11y.forEach(function (track) {
      // Clone to avoid changing of parameters.
      var clone = $.extend(true, {}, track);

      // Create working URL without html entities
      if (clone.track && clone.track.path) {
        clone.track.path = $cleaner.html(clone.track.path).text();
        tracks.push(clone);
      }
    });

    /**
     * Handle autoplay. If autoplay is disabled, it will still autopause when
     * video is not visible.
     *
     * @param {*} $container
     */
    const handleAutoPlayPause = function ($container) {
      // Keep the current state
      let state;
      self.on('stateChange', function(event) {
        state = event.data;
      });

      // Keep record of autopauses.
      // I.e: we don't wanna autoplay if the user has excplicitly paused.
      self.autoPaused = !self.pressToPlay;

      new IntersectionObserver(function (entries) {
        const entry = entries[0];

        // This video element became visible
        if (entry.isIntersecting) {
          // Autoplay if autoplay is enabled and it was not explicitly
          // paused by a user
          if (parameters.playback.autoplay && self.autoPaused) {
            self.autoPaused = false;
            self.play();
          }
        }
        else if (state !== Video.PAUSED && state !== Video.ENDED) {
          self.autoPaused = true;
          self.pause();
        }
      }, {
        root: null,
        threshold: [0, 1] // Get events when it is shown and hidden
      }).observe($container.get(0));
    };

    /**
     * Attaches the video handler to the given container.
     * Inserts text if no handler is found.
     *
     * @public
     * @param {jQuery} $container
     */
    self.attach = function ($container) {
      $container.addClass('h5p-video').html('');

      if (self.appendTo !== undefined) {
        self.appendTo($container);

        // Avoid autoplaying in authoring tool
        if (window.H5PEditor === undefined) {
          handleAutoPlayPause($container);
        }
      }
      else if (sources.length) {
        $container.text(parameters.l10n.noPlayers);
      }
      else {
        $container.text(parameters.l10n.noSources);
      }
    };

    /**
     * Get name of the video handler
     *
     * @public
     * @returns {string}
     */
    self.getHandlerName = function() {
      return handlerName;
    };

    /**
    * @public
    * Get current state for resume support.
    *
    * @returns {object} Current state.
    */
    self.getCurrentState = function () {
      if (self.getCurrentTime) {
        return {
          time: self.getCurrentTime() || self.oldTime,
        };
      }
    };

    /**
     * The two functions below needs to be defined in this base class,
     * since it is used in this class even if no handler was found.
     */
    self.seek = () => {};
    self.pause = () => {};

    /**
    * @public
    * Reset current state (time).
    *
    */
    self.resetTask = function () {
      delete self.oldTime;
      self.resetPlayback(parameters.startAt || 0);
    };

    /**
     * Default implementation of resetPlayback. May be overridden by sub classes.
     *
     * @param {*} startAt
     */
    self.resetPlayback = startAt => {
      self.seek(startAt);
      self.pause();
      self.WAS_RESET = true;
    };

    // Resize the video when we know its aspect ratio
    self.on('loaded', function () {
      self.trigger('resize');

      // reset time if wasn't done immediately
      if (self.WAS_RESET) {
        self.seek(parameters.startAt || 0);
        if (!parameters.playback.autoplay) {
          self.pause();
        }
        self.WAS_RESET = false;
      }

    });

    // Find player for video sources
    if (sources.length) {
      const options = {
        controls: parameters.visuals.controls,
        autoplay: parameters.playback.autoplay,
        loop: parameters.playback.loop,
        fit: parameters.visuals.fit,
        poster: parameters.visuals.poster === undefined ? undefined : parameters.visuals.poster,
        tracks: tracks,
        disableRemotePlayback: parameters.visuals.disableRemotePlayback === true,
        disableFullscreen: parameters.visuals.disableFullscreen === true,
        deactivateSound: parameters.playback.deactivateSound,
      }
      if (!self.WAS_RESET) {
        options.startAt = self.oldTime !== undefined ? self.oldTime : (parameters.startAt || 0);
      }

      var html5Handler;
      for (var i = 0; i < handlers.length; i++) {
        var handler = handlers[i];
        if (handler.canPlay !== undefined && handler.canPlay(sources)) {
          handler.call(self, sources, options, parameters.l10n);
          handlerName = handler.name;
          return;
        }

        if (handler === H5P.VideoHtml5) {
          html5Handler = handler;
          handlerName = handler.name;
        }
      }

      // Fallback to trying HTML5 player
      if (html5Handler) {
        html5Handler.call(self, sources, options, parameters.l10n);
      }
    }
  }

  // Extends the event dispatcher
  Video.prototype = Object.create(H5P.EventDispatcher.prototype);
  Video.prototype.constructor = Video;

  // Player states
  /** @constant {Number} */
  Video.ENDED = 0;
  /** @constant {Number} */
  Video.PLAYING = 1;
  /** @constant {Number} */
  Video.PAUSED = 2;
  /** @constant {Number} */
  Video.BUFFERING = 3;
  /**
   * When video is queued to start
   * @constant {Number}
   */
  Video.VIDEO_CUED = 5;


  // Used to convert between html and text, since URLs have html entities.
  var $cleaner = H5P.jQuery('<div/>');

  /**
   * Help keep track of key value pairs used by the UI.
   *
   * @class
   * @param {string} label
   * @param {string} value
   */
  Video.LabelValue = function (label, value) {
    this.label = label;
    this.value = value;
  };

 /**
  * Determine whether video can be autoplayed.
  * @returns {Promise<boolean>} Whether autoplay is allowed.
  */
  Video.isAutoplayAllowed = async () => {
   if (document.featurePolicy?.allowsFeature('autoplay')) {
     return true; // Browser supports `featurePolicy` and can tell directly
   }

   const video = document.createElement('video');

   /*
    * Without a video source, the play Promise will be rejected with an error
    * if it cannot be autoplayed, but not resolve at all if it can be
    * autoplayed. Using a timeout to detect the latter case here.
    */
   const timeoutMs = 50; // If play promise rejects, then within few ms

   const timeoutPromise = new Promise((resolve) => {
     window.setTimeout(() => {
       resolve(true); // Timeout reached, autoplay is allowed
     }, timeoutMs);
   });

   let result;
   try {
     result = (await Promise.race([video.play(), timeoutPromise])) ?? true;
   } catch (error) {
     result = false;
   }

   return result;
 };

  /** @constant {Boolean} */
  Video.IE11_PLAYBACK_RATE_FIX = (navigator.userAgent.match(/Trident.*rv[ :]*11\./) ? true : false);

  return Video;
})(H5P.jQuery, H5P.ContentCopyrights, H5P.MediaCopyright, H5P.videoHandlers || []);
;var H5P = H5P || {};

/**
 * Class responsible for creating a help text dialog
 */
H5P.JoubelHelpTextDialog = (function ($) {

  var numInstances = 0;
  /**
   * Display a pop-up containing a message.
   *
   * @param {H5P.jQuery}  $container  The container which message dialog will be appended to
   * @param {string}      message     The message
   * @param {string}      closeButtonTitle The title for the close button
   * @return {H5P.jQuery}
   */
  function JoubelHelpTextDialog(header, message, closeButtonTitle) {
    H5P.EventDispatcher.call(this);

    var self = this;

    numInstances++;
    var headerId = 'joubel-help-text-header-' + numInstances;
    var helpTextId = 'joubel-help-text-body-' + numInstances;

    var $helpTextDialogBox = $('<div>', {
      'class': 'joubel-help-text-dialog-box',
      'role': 'dialog',
      'aria-labelledby': headerId,
      'aria-describedby': helpTextId
    });

    $('<div>', {
      'class': 'joubel-help-text-dialog-background'
    }).appendTo($helpTextDialogBox);

    var $helpTextDialogContainer = $('<div>', {
      'class': 'joubel-help-text-dialog-container'
    }).appendTo($helpTextDialogBox);

    $('<div>', {
      'class': 'joubel-help-text-header',
      'id': headerId,
      'role': 'header',
      'html': header
    }).appendTo($helpTextDialogContainer);

    $('<div>', {
      'class': 'joubel-help-text-body',
      'id': helpTextId,
      'html': message,
      'role': 'document',
      'tabindex': 0
    }).appendTo($helpTextDialogContainer);

    var handleClose = function () {
      $helpTextDialogBox.remove();
      self.trigger('closed');
    };

    var $closeButton = $('<div>', {
      'class': 'joubel-help-text-remove',
      'role': 'button',
      'title': closeButtonTitle,
      'tabindex': 1,
      'click': handleClose,
      'keydown': function (event) {
        // 32 - space, 13 - enter
        if ([32, 13].indexOf(event.which) !== -1) {
          event.preventDefault();
          handleClose();
        }
      }
    }).appendTo($helpTextDialogContainer);

    /**
     * Get the DOM element
     * @return {HTMLElement}
     */
    self.getElement = function () {
      return $helpTextDialogBox;
    };

    self.focus = function () {
      $closeButton.focus();
    };
  }

  JoubelHelpTextDialog.prototype = Object.create(H5P.EventDispatcher.prototype);
  JoubelHelpTextDialog.prototype.constructor = JoubelHelpTextDialog;

  return JoubelHelpTextDialog;
}(H5P.jQuery));
;var H5P = H5P || {};

/**
 * Class responsible for creating auto-disappearing dialogs
 */
H5P.JoubelMessageDialog = (function ($) {

  /**
   * Display a pop-up containing a message.
   *
   * @param {H5P.jQuery} $container The container which message dialog will be appended to
   * @param {string} message The message
   * @return {H5P.jQuery}
   */
  function JoubelMessageDialog ($container, message) {
    var timeout;

    var removeDialog = function () {
      $warning.remove();
      clearTimeout(timeout);
      $container.off('click.messageDialog');
    };

    // Create warning popup:
    var $warning = $('<div/>', {
      'class': 'joubel-message-dialog',
      text: message
    }).appendTo($container);

    // Remove after 3 seconds or if user clicks anywhere in $container:
    timeout = setTimeout(removeDialog, 3000);
    $container.on('click.messageDialog', removeDialog);

    return $warning;
  }

  return JoubelMessageDialog;
})(H5P.jQuery);
;var H5P = H5P || {};

/**
 * Class responsible for creating a circular progress bar
 */

H5P.JoubelProgressCircle = (function ($) {

  /**
   * Constructor for the Progress Circle
   *
   * @param {Number} number The amount of progress to display
   * @param {string} progressColor Color for the progress meter
   * @param {string} backgroundColor Color behind the progress meter
   */
  function ProgressCircle(number, progressColor, fillColor, backgroundColor) {
    progressColor = progressColor || '#1a73d9';
    fillColor = fillColor || '#f0f0f0';
    backgroundColor = backgroundColor || '#ffffff';
    var progressColorRGB = this.hexToRgb(progressColor);

    //Verify number
    try {
      number = Number(number);
      if (number === '') {
        throw 'is empty';
      }
      if (isNaN(number)) {
        throw 'is not a number';
      }
    } catch (e) {
      number = 'err';
    }

    //Draw circle
    if (number > 100) {
      number = 100;
    }

    // We can not use rgba, since they will stack on top of each other.
    // Instead we create the equivalent of the rgba color
    // and applies this to the activeborder and background color.
    var progressColorString = 'rgb(' + parseInt(progressColorRGB.r, 10) +
      ',' + parseInt(progressColorRGB.g, 10) +
      ',' + parseInt(progressColorRGB.b, 10) + ')';

    // Circle wrapper
    var $wrapper = $('<div/>', {
      'class': "joubel-progress-circle-wrapper"
    });

    //Active border indicates progress
    var $activeBorder = $('<div/>', {
      'class': "joubel-progress-circle-active-border"
    }).appendTo($wrapper);

    //Background circle
    var $backgroundCircle = $('<div/>', {
      'class': "joubel-progress-circle-circle"
    }).appendTo($activeBorder);

    //Progress text/number
    $('<span/>', {
      'text': number + '%',
      'class': "joubel-progress-circle-percentage"
    }).appendTo($backgroundCircle);

    var deg = number * 3.6;
    if (deg <= 180) {
      $activeBorder.css('background-image',
        'linear-gradient(' + (90 + deg) + 'deg, transparent 50%, ' + fillColor + ' 50%),' +
        'linear-gradient(90deg, ' + fillColor + ' 50%, transparent 50%)')
        .css('border', '2px solid' + backgroundColor)
        .css('background-color', progressColorString);
    } else {
      $activeBorder.css('background-image',
        'linear-gradient(' + (deg - 90) + 'deg, transparent 50%, ' + progressColorString + ' 50%),' +
        'linear-gradient(90deg, ' + fillColor + ' 50%, transparent 50%)')
        .css('border', '2px solid' + backgroundColor)
        .css('background-color', progressColorString);
    }

    this.$activeBorder = $activeBorder;
    this.$backgroundCircle = $backgroundCircle;
    this.$wrapper = $wrapper;

    this.initResizeFunctionality();

    return $wrapper;
  }

  /**
   * Initializes resize functionality for the progress circle
   */
  ProgressCircle.prototype.initResizeFunctionality = function () {
    var self = this;

    $(window).resize(function () {
      // Queue resize
      setTimeout(function () {
        self.resize();
      });
    });

    // First resize
    setTimeout(function () {
      self.resize();
    }, 0);
  };

  /**
   * Resize function makes progress circle grow or shrink relative to parent container
   */
  ProgressCircle.prototype.resize = function () {
    var $parent = this.$wrapper.parent();

    if ($parent !== undefined && $parent) {

      // Measurements
      var fontSize = parseInt($parent.css('font-size'), 10);

      // Static sizes
      var fontSizeMultiplum = 3.75;
      var progressCircleWidthPx = parseInt((fontSize / 4.5), 10) % 2 === 0 ? parseInt((fontSize / 4.5), 10) + 4 : parseInt((fontSize / 4.5), 10) + 5;
      var progressCircleOffset = progressCircleWidthPx / 2;

      var width = fontSize * fontSizeMultiplum;
      var height = fontSize * fontSizeMultiplum;
      this.$activeBorder.css({
        'width': width,
        'height': height
      });

      this.$backgroundCircle.css({
        'width': width - progressCircleWidthPx,
        'height': height - progressCircleWidthPx,
        'top': progressCircleOffset,
        'left': progressCircleOffset
      });
    }
  };

  /**
   * Hex to RGB conversion
   * @param hex
   * @returns {{r: Number, g: Number, b: Number}}
   */
  ProgressCircle.prototype.hexToRgb = function (hex) {
    var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
    return result ? {
      r: parseInt(result[1], 16),
      g: parseInt(result[2], 16),
      b: parseInt(result[3], 16)
    } : null;
  };

  return ProgressCircle;

}(H5P.jQuery));
;var H5P = H5P || {};

H5P.SimpleRoundedButton = (function ($) {

  /**
   * Creates a new tip
   */
  function SimpleRoundedButton(text) {

    var $simpleRoundedButton = $('<div>', {
      'class': 'joubel-simple-rounded-button',
      'title': text,
      'role': 'button',
      'tabindex': '0'
    }).keydown(function (e) {
      // 32 - space, 13 - enter
      if ([32, 13].indexOf(e.which) !== -1) {
        $(this).click();
        e.preventDefault();
      }
    });

    $('<span>', {
      'class': 'joubel-simple-rounded-button-text',
      'html': text
    }).appendTo($simpleRoundedButton);

    return $simpleRoundedButton;
  }

  return SimpleRoundedButton;
}(H5P.jQuery));
;var H5P = H5P || {};

/**
 * Class responsible for creating speech bubbles
 */
H5P.JoubelSpeechBubble = (function ($) {

  var $currentSpeechBubble;
  var $currentContainer;  
  var $tail;
  var $innerTail;
  var removeSpeechBubbleTimeout;
  var currentMaxWidth;

  var DEFAULT_MAX_WIDTH = 400;

  var iDevice = navigator.userAgent.match(/iPod|iPhone|iPad/g) ? true : false;

  /**
   * Creates a new speech bubble
   *
   * @param {H5P.jQuery} $container The speaking object
   * @param {string} text The text to display
   * @param {number} maxWidth The maximum width of the bubble
   * @return {H5P.JoubelSpeechBubble}
   */
  function JoubelSpeechBubble($container, text, maxWidth) {
    maxWidth = maxWidth || DEFAULT_MAX_WIDTH;
    currentMaxWidth = maxWidth;
    $currentContainer = $container;

    this.isCurrent = function ($tip) {
      return $tip.is($currentContainer);
    };

    this.remove = function () {
      remove();
    };

    var fadeOutSpeechBubble = function ($speechBubble) {
      if (!$speechBubble) {
        return;
      }

      // Stop removing bubble
      clearTimeout(removeSpeechBubbleTimeout);

      $speechBubble.removeClass('show');
      setTimeout(function () {
        if ($speechBubble) {
          $speechBubble.remove();
          $speechBubble = undefined;
        }
      }, 500);
    };

    if ($currentSpeechBubble !== undefined) {
      remove();
    }

    var $h5pContainer = getH5PContainer($container);

    // Make sure we fade out old speech bubble
    fadeOutSpeechBubble($currentSpeechBubble);

    // Create bubble
    $tail = $('<div class="joubel-speech-bubble-tail"></div>');
    $innerTail = $('<div class="joubel-speech-bubble-inner-tail"></div>');
    var $innerBubble = $(
      '<div class="joubel-speech-bubble-inner">' +
      '<div class="joubel-speech-bubble-text">' + text + '</div>' +
      '</div>'
    ).prepend($innerTail);

    $currentSpeechBubble = $(
      '<div class="joubel-speech-bubble" aria-live="assertive">'
    ).append([$tail, $innerBubble])
      .appendTo($h5pContainer);

    // Show speech bubble with transition
    setTimeout(function () {
      $currentSpeechBubble.addClass('show');
    }, 0);

    position($currentSpeechBubble, $currentContainer, maxWidth, $tail, $innerTail);

    // Handle click to close
    H5P.$body.on('mousedown.speechBubble', handleOutsideClick);

    // Handle window resizing
    H5P.$window.on('resize', '', handleResize);

    // Handle clicks when inside IV which blocks bubbling.
    $container.parents('.h5p-dialog')
      .on('mousedown.speechBubble', handleOutsideClick);

    if (iDevice) {
      H5P.$body.css('cursor', 'pointer');
    }

    return this;
  }

  // Remove speechbubble if it belongs to a dom element that is about to be hidden
  H5P.externalDispatcher.on('domHidden', function (event) {
    if ($currentSpeechBubble !== undefined && event.data.$dom.find($currentContainer).length !== 0) {
      remove();
    }
  });

  /**
   * Returns the closest h5p container for the given DOM element.
   * 
   * @param {object} $container jquery element
   * @return {object} the h5p container (jquery element)
   */
  function getH5PContainer($container) {
    var $h5pContainer = $container.closest('.h5p-frame');

    // Check closest h5p frame first, then check for container in case there is no frame.
    if (!$h5pContainer.length) {
      $h5pContainer = $container.closest('.h5p-container');
    }

    return $h5pContainer;
  }

  /**
   * Event handler that is called when the window is resized.
   */
  function handleResize() {
    position($currentSpeechBubble, $currentContainer, currentMaxWidth, $tail, $innerTail);
  }

  /**
   * Repositions the speech bubble according to the position of the container.
   * 
   * @param {object} $currentSpeechbubble the speech bubble that should be positioned   
   * @param {object} $container the container to which the speech bubble should point 
   * @param {number} maxWidth the maximum width of the speech bubble
   * @param {object} $tail the tail (the triangle that points to the referenced container)
   * @param {object} $innerTail the inner tail (the triangle that points to the referenced container)
   */
  function position($currentSpeechBubble, $container, maxWidth, $tail, $innerTail) {
    var $h5pContainer = getH5PContainer($container);

    // Calculate offset between the button and the h5p frame
    var offset = getOffsetBetween($h5pContainer, $container);

    var direction = (offset.bottom > offset.top ? 'bottom' : 'top');
    var tipWidth = offset.outerWidth * 0.9; // Var needs to be renamed to make sense
    var bubbleWidth = tipWidth > maxWidth ? maxWidth : tipWidth;

    var bubblePosition = getBubblePosition(bubbleWidth, offset);
    var tailPosition = getTailPosition(bubbleWidth, bubblePosition, offset, $container.width());
    // Need to set font-size, since element is appended to body.
    // Using same font-size as parent. In that way it will grow accordingly
    // when resizing
    var fontSize = 16;//parseFloat($parent.css('font-size'));

    // Set width and position of speech bubble
    $currentSpeechBubble.css(bubbleCSS(
      direction,
      bubbleWidth,
      bubblePosition,
      fontSize
    ));

    var preparedTailCSS = tailCSS(direction, tailPosition);
    $tail.css(preparedTailCSS);
    $innerTail.css(preparedTailCSS);
  }

  /**
   * Static function for removing the speechbubble
   */
  var remove = function () {
    H5P.$body.off('mousedown.speechBubble');
    H5P.$window.off('resize', '', handleResize);
    $currentContainer.parents('.h5p-dialog').off('mousedown.speechBubble');
    if (iDevice) {
      H5P.$body.css('cursor', '');
    }
    if ($currentSpeechBubble !== undefined) {
      // Apply transition, then remove speech bubble
      $currentSpeechBubble.removeClass('show');

      // Make sure we remove any old timeout before reassignment
      clearTimeout(removeSpeechBubbleTimeout);
      removeSpeechBubbleTimeout = setTimeout(function () {
        $currentSpeechBubble.remove();
        $currentSpeechBubble = undefined;
      }, 500);
    }
    // Don't return false here. If the user e.g. clicks a button when the bubble is visible,
    // we want the bubble to disapear AND the button to receive the event
  };

  /**
   * Remove the speech bubble and container reference
   */
  function handleOutsideClick(event) {
    if (event.target === $currentContainer[0]) {
      return; // Button clicks are not outside clicks
    }

    remove();
    // There is no current container when a container isn't clicked
    $currentContainer = undefined;
  }

  /**
   * Calculate position for speech bubble
   *
   * @param {number} bubbleWidth The width of the speech bubble
   * @param {object} offset
   * @return {object} Return position for the speech bubble
   */
  function getBubblePosition(bubbleWidth, offset) {
    var bubblePosition = {};

    var tailOffset = 9;
    var widthOffset = bubbleWidth / 2;

    // Calculate top position
    bubblePosition.top = offset.top + offset.innerHeight;

    // Calculate bottom position
    bubblePosition.bottom = offset.bottom + offset.innerHeight + tailOffset;

    // Calculate left position
    if (offset.left < widthOffset) {
      bubblePosition.left = 3;
    }
    else if ((offset.left + widthOffset) > offset.outerWidth) {
      bubblePosition.left = offset.outerWidth - bubbleWidth - 3;
    }
    else {
      bubblePosition.left = offset.left - widthOffset + (offset.innerWidth / 2);
    }

    return bubblePosition;
  }

  /**
   * Calculate position for speech bubble tail
   *
   * @param {number} bubbleWidth The width of the speech bubble
   * @param {object} bubblePosition Speech bubble position
   * @param {object} offset
   * @param {number} iconWidth The width of the tip icon
   * @return {object} Return position for the tail
   */
  function getTailPosition(bubbleWidth, bubblePosition, offset, iconWidth) {
    var tailPosition = {};
    // Magic numbers. Tuned by hand so that the tail fits visually within
    // the bounds of the speech bubble.
    var leftBoundary = 9;
    var rightBoundary = bubbleWidth - 20;

    tailPosition.left = offset.left - bubblePosition.left + (iconWidth / 2) - 6;
    if (tailPosition.left < leftBoundary) {
      tailPosition.left = leftBoundary;
    }
    if (tailPosition.left > rightBoundary) {
      tailPosition.left = rightBoundary;
    }

    tailPosition.top = -6;
    tailPosition.bottom = -6;

    return tailPosition;
  }

  /**
   * Return bubble CSS for the desired growth direction
   *
   * @param {string} direction The direction the speech bubble will grow
   * @param {number} width The width of the speech bubble
   * @param {object} position Speech bubble position
   * @param {number} fontSize The size of the bubbles font
   * @return {object} Return CSS
   */
  function bubbleCSS(direction, width, position, fontSize) {
    if (direction === 'top') {
      return {
        width: width + 'px',
        bottom: position.bottom + 'px',
        left: position.left + 'px',
        fontSize: fontSize + 'px',
        top: ''
      };
    }
    else {
      return {
        width: width + 'px',
        top: position.top + 'px',
        left: position.left + 'px',
        fontSize: fontSize + 'px',
        bottom: ''
      };
    }
  }

  /**
   * Return tail CSS for the desired growth direction
   *
   * @param {string} direction The direction the speech bubble will grow
   * @param {object} position Tail position
   * @return {object} Return CSS
   */
  function tailCSS(direction, position) {
    if (direction === 'top') {
      return {
        bottom: position.bottom + 'px',
        left: position.left + 'px',
        top: ''
      };
    }
    else {
      return {
        top: position.top + 'px',
        left: position.left + 'px',
        bottom: ''
      };
    }
  }

  /**
   * Calculates the offset between an element inside a container and the
   * container. Only works if all the edges of the inner element are inside the
   * outer element.
   * Width/height of the elements is included as a convenience.
   *
   * @param {H5P.jQuery} $outer
   * @param {H5P.jQuery} $inner
   * @return {object} Position offset
   */
  function getOffsetBetween($outer, $inner) {
    var outer = $outer[0].getBoundingClientRect();
    var inner = $inner[0].getBoundingClientRect();

    return {
      top: inner.top - outer.top,
      right: outer.right - inner.right,
      bottom: outer.bottom - inner.bottom,
      left: inner.left - outer.left,
      innerWidth: inner.width,
      innerHeight: inner.height,
      outerWidth: outer.width,
      outerHeight: outer.height
    };
  }

  return JoubelSpeechBubble;
})(H5P.jQuery);
;var H5P = H5P || {};

H5P.JoubelThrobber = (function ($) {

  /**
   * Creates a new tip
   */
  function JoubelThrobber() {

    // h5p-throbber css is described in core
    var $throbber = $('<div/>', {
      'class': 'h5p-throbber'
    });

    return $throbber;
  }

  return JoubelThrobber;
}(H5P.jQuery));
;H5P.JoubelTip = (function ($) {
  var $conv = $('<div/>');

  /**
   * Creates a new tip element.
   *
   * NOTE that this may look like a class but it doesn't behave like one.
   * It returns a jQuery object.
   *
   * @param {string} tipHtml The text to display in the popup
   * @param {Object} [behaviour] Options
   * @param {string} [behaviour.tipLabel] Set to use a custom label for the tip button (you want this for good A11Y)
   * @param {boolean} [behaviour.helpIcon] Set to 'true' to Add help-icon classname to Tip button (changes the icon)
   * @param {boolean} [behaviour.showSpeechBubble] Set to 'false' to disable functionality (you may this in the editor)
   * @param {boolean} [behaviour.tabcontrol] Set to 'true' if you plan on controlling the tabindex in the parent (tabindex="-1")
   * @return {H5P.jQuery|undefined} Tip button jQuery element or 'undefined' if invalid tip
   */
  function JoubelTip(tipHtml, behaviour) {

    // Keep track of the popup that appears when you click the Tip button
    var speechBubble;

    // Parse tip html to determine text
    var tipText = $conv.html(tipHtml).text().trim();
    if (tipText === '') {
      return; // The tip has no textual content, i.e. it's invalid.
    }

    // Set default behaviour
    behaviour = $.extend({
      tipLabel: tipText,
      helpIcon: false,
      showSpeechBubble: true,
      tabcontrol: false
    }, behaviour);

    // Create Tip button
    var $tipButton = $('<div/>', {
      class: 'joubel-tip-container' + (behaviour.showSpeechBubble ? '' : ' be-quiet'),
      'aria-label': behaviour.tipLabel,
      'aria-expanded': false,
      role: 'button',
      tabindex: (behaviour.tabcontrol ? -1 : 0),
      click: function (event) {
        // Toggle show/hide popup
        toggleSpeechBubble();
        event.preventDefault();
      },
      keydown: function (event) {
        if (event.which === 32 || event.which === 13) { // Space & enter key
          // Toggle show/hide popup
          toggleSpeechBubble();
          event.stopPropagation();
          event.preventDefault();
        }
        else { // Any other key
          // Toggle hide popup
          toggleSpeechBubble(false);
        }
      },
      // Add markup to render icon
      html: '<span class="joubel-icon-tip-normal ' + (behaviour.helpIcon ? ' help-icon': '') + '">' +
              '<span class="h5p-icon-shadow"></span>' +
              '<span class="h5p-icon-speech-bubble"></span>' +
              '<span class="h5p-icon-info"></span>' +
            '</span>'
      // IMPORTANT: All of the markup elements must have 'pointer-events: none;'
    });

    const $tipAnnouncer = $('<div>', {
      'class': 'hidden-but-read',
      'aria-live': 'polite',
      appendTo: $tipButton,
    });

    /**
     * Tip button interaction handler.
     * Toggle show or hide the speech bubble popup when interacting with the
     * Tip button.
     *
     * @private
     * @param {boolean} [force] 'true' shows and 'false' hides.
     */
    var toggleSpeechBubble = function (force) {
      if (speechBubble !== undefined && speechBubble.isCurrent($tipButton)) {
        // Hide current popup
        speechBubble.remove();
        speechBubble = undefined;

        $tipButton.attr('aria-expanded', false);
        $tipAnnouncer.html('');
      }
      else if (force !== false && behaviour.showSpeechBubble) {
        // Create and show new popup
        speechBubble = H5P.JoubelSpeechBubble($tipButton, tipHtml);
        $tipButton.attr('aria-expanded', true);
        $tipAnnouncer.html(tipHtml);
      }
    };

    return $tipButton;
  }

  return JoubelTip;
})(H5P.jQuery);
;var H5P = H5P || {};

H5P.JoubelSlider = (function ($) {

  /**
   * Creates a new Slider
   *
   * @param {object} [params] Additional parameters
   */
  function JoubelSlider(params) {
    H5P.EventDispatcher.call(this);

    this.$slider = $('<div>', $.extend({
      'class': 'h5p-joubel-ui-slider'
    }, params));

    this.$slides = [];
    this.currentIndex = 0;
    this.numSlides = 0;
  }
  JoubelSlider.prototype = Object.create(H5P.EventDispatcher.prototype);
  JoubelSlider.prototype.constructor = JoubelSlider;

  JoubelSlider.prototype.addSlide = function ($content) {
    $content.addClass('h5p-joubel-ui-slide').css({
      'left': (this.numSlides*100) + '%'
    });
    this.$slider.append($content);
    this.$slides.push($content);

    this.numSlides++;

    if(this.numSlides === 1) {
      $content.addClass('current');
    }
  };

  JoubelSlider.prototype.attach = function ($container) {
    $container.append(this.$slider);
  };

  JoubelSlider.prototype.move = function (index) {
    var self = this;

    if(index === 0) {
      self.trigger('first-slide');
    }
    if(index+1 === self.numSlides) {
      self.trigger('last-slide');
    }
    self.trigger('move');

    var $previousSlide = self.$slides[this.currentIndex];
    H5P.Transition.onTransitionEnd(this.$slider, function () {
      $previousSlide.removeClass('current');
      self.trigger('moved');
    });
    this.$slides[index].addClass('current');

    var translateX = 'translateX(' + (-index*100) + '%)';
    this.$slider.css({
      '-webkit-transform': translateX,
      '-moz-transform': translateX,
      '-ms-transform': translateX,
      'transform': translateX
    });

    this.currentIndex = index;
  };

  JoubelSlider.prototype.remove = function () {
    this.$slider.remove();
  };

  JoubelSlider.prototype.next = function () {
    if(this.currentIndex+1 >= this.numSlides) {
      return;
    }

    this.move(this.currentIndex+1);
  };

  JoubelSlider.prototype.previous = function () {
    this.move(this.currentIndex-1);
  };

  JoubelSlider.prototype.first = function () {
    this.move(0);
  };

  JoubelSlider.prototype.last = function () {
    this.move(this.numSlides-1);
  };

  return JoubelSlider;
})(H5P.jQuery);
;var H5P = H5P || {};

/**
 * @module
 */
H5P.JoubelScoreBar = (function ($) {

  /* Need to use an id for the star SVG since that is the only way to reference
     SVG filters  */
  var idCounter = 0;

  /**
   * Creates a score bar
   * @class H5P.JoubelScoreBar
   * @param {number} maxScore  Maximum score
   * @param {string} [label] Makes it easier for readspeakers to identify the scorebar
   * @param {string} [helpText] Score explanation
   * @param {string} [scoreExplanationButtonLabel] Label for score explanation button
   */
  function JoubelScoreBar(maxScore, label, helpText, scoreExplanationButtonLabel) {
    var self = this;

    self.maxScore = maxScore;
    self.score = 0;
    idCounter++;

    /**
     * @const {string}
     */
    self.STAR_MARKUP = '<svg tabindex="-1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 63.77 53.87" aria-hidden="true" focusable="false">' +
        '<title>star</title>' +
        '<filter tabindex="-1" id="h5p-joubelui-score-bar-star-inner-shadow-' + idCounter + '" x0="-50%" y0="-50%" width="200%" height="200%">' +
          '<feGaussianBlur in="SourceAlpha" stdDeviation="3" result="blur"></feGaussianBlur>' +
          '<feOffset dy="2" dx="4"></feOffset>' +
          '<feComposite in2="SourceAlpha" operator="arithmetic" k2="-1" k3="1" result="shadowDiff"></feComposite>' +
          '<feFlood flood-color="#ffe95c" flood-opacity="1"></feFlood>' +
          '<feComposite in2="shadowDiff" operator="in"></feComposite>' +
          '<feComposite in2="SourceGraphic" operator="over" result="firstfilter"></feComposite>' +
          '<feGaussianBlur in="firstfilter" stdDeviation="3" result="blur2"></feGaussianBlur>' +
          '<feOffset dy="-2" dx="-4"></feOffset>' +
          '<feComposite in2="firstfilter" operator="arithmetic" k2="-1" k3="1" result="shadowDiff"></feComposite>' +
          '<feFlood flood-color="#ffe95c" flood-opacity="1"></feFlood>' +
          '<feComposite in2="shadowDiff" operator="in"></feComposite>' +
          '<feComposite in2="firstfilter" operator="over"></feComposite>' +
        '</filter>' +
        '<path tabindex="-1" class="h5p-joubelui-score-bar-star-shadow" d="M35.08,43.41V9.16H20.91v0L9.51,10.85,9,10.93C2.8,12.18,0,17,0,21.25a11.22,11.22,0,0,0,3,7.48l8.73,8.53-1.07,6.16Z"/>' +
        '<g tabindex="-1">' +
          '<path tabindex="-1" class="h5p-joubelui-score-bar-star-border" d="M61.36,22.8,49.72,34.11l2.78,16a2.6,2.6,0,0,1,.05.64c0,.85-.37,1.6-1.33,1.6A2.74,2.74,0,0,1,49.94,52L35.58,44.41,21.22,52a2.93,2.93,0,0,1-1.28.37c-.91,0-1.33-.75-1.33-1.6,0-.21.05-.43.05-.64l2.78-16L9.8,22.8A2.57,2.57,0,0,1,9,21.25c0-1,1-1.33,1.81-1.49l16.07-2.35L34.09,2.83c.27-.59.85-1.33,1.55-1.33s1.28.69,1.55,1.33l7.21,14.57,16.07,2.35c.75.11,1.81.53,1.81,1.49A3.07,3.07,0,0,1,61.36,22.8Z"/>' +
          '<path tabindex="-1" class="h5p-joubelui-score-bar-star-fill" d="M61.36,22.8,49.72,34.11l2.78,16a2.6,2.6,0,0,1,.05.64c0,.85-.37,1.6-1.33,1.6A2.74,2.74,0,0,1,49.94,52L35.58,44.41,21.22,52a2.93,2.93,0,0,1-1.28.37c-.91,0-1.33-.75-1.33-1.6,0-.21.05-.43.05-.64l2.78-16L9.8,22.8A2.57,2.57,0,0,1,9,21.25c0-1,1-1.33,1.81-1.49l16.07-2.35L34.09,2.83c.27-.59.85-1.33,1.55-1.33s1.28.69,1.55,1.33l7.21,14.57,16.07,2.35c.75.11,1.81.53,1.81,1.49A3.07,3.07,0,0,1,61.36,22.8Z"/>' +
          '<path tabindex="-1" filter="url(#h5p-joubelui-score-bar-star-inner-shadow-' + idCounter + ')" class="h5p-joubelui-score-bar-star-fill-full-score" d="M61.36,22.8,49.72,34.11l2.78,16a2.6,2.6,0,0,1,.05.64c0,.85-.37,1.6-1.33,1.6A2.74,2.74,0,0,1,49.94,52L35.58,44.41,21.22,52a2.93,2.93,0,0,1-1.28.37c-.91,0-1.33-.75-1.33-1.6,0-.21.05-.43.05-.64l2.78-16L9.8,22.8A2.57,2.57,0,0,1,9,21.25c0-1,1-1.33,1.81-1.49l16.07-2.35L34.09,2.83c.27-.59.85-1.33,1.55-1.33s1.28.69,1.55,1.33l7.21,14.57,16.07,2.35c.75.11,1.81.53,1.81,1.49A3.07,3.07,0,0,1,61.36,22.8Z"/>' +
        '</g>' +
      '</svg>';

    /**
     * @function appendTo
     * @memberOf H5P.JoubelScoreBar#
     * @param {H5P.jQuery}  $wrapper  Dom container
     */
    self.appendTo = function ($wrapper) {
      self.$scoreBar.appendTo($wrapper);
    };

    /**
     * Create the text representation of the scorebar .
     *
     * @private
     * @return {string}
     */
    var createLabel = function (score) {
      if (!label) {
        return '';
      }

      return label.replace(':num', score).replace(':total', self.maxScore);
    };

    /**
     * Creates the html for this widget
     *
     * @method createHtml
     * @private
     */
    var createHtml = function () {
      // Container div
      self.$scoreBar = $('<div>', {
        'class': 'h5p-joubelui-score-bar',
      });

      var $visuals = $('<div>', {
        'class': 'h5p-joubelui-score-bar-visuals',
        appendTo: self.$scoreBar
      });

      // The progress bar wrapper
      self.$progressWrapper = $('<div>', {
        'class': 'h5p-joubelui-score-bar-progress-wrapper',
        appendTo: $visuals
      });

      self.$progress = $('<div>', {
        'class': 'h5p-joubelui-score-bar-progress',
        'html': createLabel(self.score),
        appendTo: self.$progressWrapper
      });

      // The star
      $('<div>', {
        'class': 'h5p-joubelui-score-bar-star',
        html: self.STAR_MARKUP
      }).appendTo($visuals);

      // The score container
      var $numerics = $('<div>', {
        'class': 'h5p-joubelui-score-numeric',
        appendTo: self.$scoreBar,
        'aria-hidden': true
      });

      // The current score
      self.$scoreCounter = $('<span>', {
        'class': 'h5p-joubelui-score-number h5p-joubelui-score-number-counter',
        text: 0,
        appendTo: $numerics
      });

      // The separator
      $('<span>', {
        'class': 'h5p-joubelui-score-number-separator',
        text: '/',
        appendTo: $numerics
      });

      // Max score
      self.$maxScore = $('<span>', {
        'class': 'h5p-joubelui-score-number h5p-joubelui-score-max',
        text: self.maxScore,
        appendTo: $numerics
      });

      if (helpText) {
        H5P.JoubelUI.createTip(helpText, {
          tipLabel: scoreExplanationButtonLabel ? scoreExplanationButtonLabel : helpText,
          helpIcon: true
        }).appendTo(self.$scoreBar);
        self.$scoreBar.addClass('h5p-score-bar-has-help');
      }
    };

    /**
     * Set the current score
     * @method setScore
     * @memberOf H5P.JoubelScoreBar#
     * @param  {number} score
     */
    self.setScore = function (score) {
      // Do nothing if score hasn't changed
      if (score === self.score) {
        return;
      }
      self.score = score > self.maxScore ? self.maxScore : score;
      self.updateVisuals();
    };

    /**
     * Increment score
     * @method incrementScore
     * @memberOf H5P.JoubelScoreBar#
     * @param  {number=}        incrementBy Optional parameter, defaults to 1
     */
    self.incrementScore = function (incrementBy) {
      self.setScore(self.score + (incrementBy || 1));
    };

    /**
     * Set the max score
     * @method setMaxScore
     * @memberOf H5P.JoubelScoreBar#
     * @param  {number}    maxScore The max score
     */
    self.setMaxScore = function (maxScore) {
      self.maxScore = maxScore;
    };

    /**
     * Updates the progressbar visuals
     * @memberOf H5P.JoubelScoreBar#
     * @method updateVisuals
     */
    self.updateVisuals = function () {
      self.$progress.html(createLabel(self.score));
      self.$scoreCounter.text(self.score);
      self.$maxScore.text(self.maxScore);

      setTimeout(function () {
        // Start the progressbar animation
        self.$progress.css({
          width: ((self.score / self.maxScore) * 100) + '%'
        });

        H5P.Transition.onTransitionEnd(self.$progress, function () {
          // If fullscore fill the star and start the animation
          self.$scoreBar.toggleClass('h5p-joubelui-score-bar-full-score', self.score === self.maxScore);
          self.$scoreBar.toggleClass('h5p-joubelui-score-bar-animation-active', self.score === self.maxScore);

          // Only allow the star animation to run once
          self.$scoreBar.one("animationend", function() {
            self.$scoreBar.removeClass("h5p-joubelui-score-bar-animation-active");
          });
        }, 600);
      }, 300);
    };

    /**
     * Removes all classes
     * @method reset
     */
    self.reset = function () {
      self.$scoreBar.removeClass('h5p-joubelui-score-bar-full-score');
    };

    createHtml();
  }

  return JoubelScoreBar;
})(H5P.jQuery);
;var H5P = H5P || {};

H5P.JoubelProgressbar = (function ($) {

  /**
   * Joubel progressbar class
   * @method JoubelProgressbar
   * @constructor
   * @param  {number}          steps Number of steps
   * @param {Object} [options] Additional options
   * @param {boolean} [options.disableAria] Disable readspeaker assistance
   * @param {string} [options.progressText] A progress text for describing
   *  current progress out of total progress for readspeakers.
   *  e.g. "Slide :num of :total"
   */
  function JoubelProgressbar(steps, options) {
    H5P.EventDispatcher.call(this);
    var self = this;
    this.options = $.extend({
      progressText: 'Slide :num of :total'
    }, options);
    this.currentStep = 0;
    this.steps = steps;

    this.$progressbar = $('<div>', {
      'class': 'h5p-joubelui-progressbar'
    });
    this.$background = $('<div>', {
      'class': 'h5p-joubelui-progressbar-background'
    }).appendTo(this.$progressbar);
  }

  JoubelProgressbar.prototype = Object.create(H5P.EventDispatcher.prototype);
  JoubelProgressbar.prototype.constructor = JoubelProgressbar;

  JoubelProgressbar.prototype.updateAria = function () {
    var self = this;
    if (this.options.disableAria) {
      return;
    }

    if (!this.$currentStatus) {
      this.$currentStatus = $('<div>', {
        'class': 'h5p-joubelui-progressbar-slide-status-text',
        'aria-live': 'assertive'
      }).appendTo(this.$progressbar);
    }
    var interpolatedProgressText = self.options.progressText
      .replace(':num', self.currentStep)
      .replace(':total', self.steps);
    this.$currentStatus.html(interpolatedProgressText);
  };

  /**
   * Appends to a container
   * @method appendTo
   * @param  {H5P.jquery} $container
   */
  JoubelProgressbar.prototype.appendTo = function ($container) {
    this.$progressbar.appendTo($container);
  };

  /**
   * Update progress
   * @method setProgress
   * @param  {number}    step
   */
  JoubelProgressbar.prototype.setProgress = function (step) {
    // Check for valid value:
    if (step > this.steps || step < 0) {
      return;
    }
    this.currentStep = step;
    this.$background.css({
      width: ((this.currentStep/this.steps)*100) + '%'
    });

    this.updateAria();
  };

  /**
   * Increment progress with 1
   * @method next
   */
  JoubelProgressbar.prototype.next = function () {
    this.setProgress(this.currentStep+1);
  };

  /**
   * Reset progressbar
   * @method reset
   */
  JoubelProgressbar.prototype.reset = function () {
    this.setProgress(0);
  };

  /**
   * Check if last step is reached
   * @method isLastStep
   * @return {Boolean}
   */
  JoubelProgressbar.prototype.isLastStep = function () {
    return this.steps === this.currentStep;
  };

  return JoubelProgressbar;
})(H5P.jQuery);
;var H5P = H5P || {};

/**
 * H5P Joubel UI library.
 *
 * This is a utility library, which does not implement attach. I.e, it has to bee actively used by
 * other libraries
 * @module
 */
H5P.JoubelUI = (function ($) {

  /**
   * The internal object to return
   * @class H5P.JoubelUI
   * @static
   */
  function JoubelUI() {}

  /* Public static functions */

  /**
   * Create a tip icon
   * @method H5P.JoubelUI.createTip
   * @param  {string}  text   The textual tip
   * @param  {Object}  params Parameters
   * @return {H5P.JoubelTip}
   */
  JoubelUI.createTip = function (text, params) {
    return new H5P.JoubelTip(text, params);
  };

  /**
   * Create message dialog
   * @method H5P.JoubelUI.createMessageDialog
   * @param  {H5P.jQuery}               $container The dom container
   * @param  {string}                   message    The message
   * @return {H5P.JoubelMessageDialog}
   */
  JoubelUI.createMessageDialog = function ($container, message) {
    return new H5P.JoubelMessageDialog($container, message);
  };

  /**
   * Create help text dialog
   * @method H5P.JoubelUI.createHelpTextDialog
   * @param  {string}             header  The textual header
   * @param  {string}             message The textual message
   * @param  {string}             closeButtonTitle The title for the close button
   * @return {H5P.JoubelHelpTextDialog}
   */
  JoubelUI.createHelpTextDialog = function (header, message, closeButtonTitle) {
    return new H5P.JoubelHelpTextDialog(header, message, closeButtonTitle);
  };

  /**
   * Create progress circle
   * @method H5P.JoubelUI.createProgressCircle
   * @param  {number}             number          The progress (0 to 100)
   * @param  {string}             progressColor   The progress color in hex value
   * @param  {string}             fillColor       The fill color in hex value
   * @param  {string}             backgroundColor The background color in hex value
   * @return {H5P.JoubelProgressCircle}
   */
  JoubelUI.createProgressCircle = function (number, progressColor, fillColor, backgroundColor) {
    return new H5P.JoubelProgressCircle(number, progressColor, fillColor, backgroundColor);
  };

  /**
   * Create throbber for loading
   * @method H5P.JoubelUI.createThrobber
   * @return {H5P.JoubelThrobber}
   */
  JoubelUI.createThrobber = function () {
    return new H5P.JoubelThrobber();
  };

  /**
   * Create simple rounded button
   * @method H5P.JoubelUI.createSimpleRoundedButton
   * @param  {string}                  text The button label
   * @return {H5P.SimpleRoundedButton}
   */
  JoubelUI.createSimpleRoundedButton = function (text) {
    return new H5P.SimpleRoundedButton(text);
  };

  /**
   * Create Slider
   * @method H5P.JoubelUI.createSlider
   * @param  {Object} [params] Parameters
   * @return {H5P.JoubelSlider}
   */
  JoubelUI.createSlider = function (params) {
    return new H5P.JoubelSlider(params);
  };

  /**
   * Create Score Bar
   * @method H5P.JoubelUI.createScoreBar
   * @param  {number=}       maxScore The maximum score
   * @param {string} [label] Makes it easier for readspeakers to identify the scorebar
   * @return {H5P.JoubelScoreBar}
   */
  JoubelUI.createScoreBar = function (maxScore, label, helpText, scoreExplanationButtonLabel) {
    return new H5P.JoubelScoreBar(maxScore, label, helpText, scoreExplanationButtonLabel);
  };

  /**
   * Create Progressbar
   * @method H5P.JoubelUI.createProgressbar
   * @param  {number=}       numSteps The total numer of steps
   * @param {Object} [options] Additional options
   * @param {boolean} [options.disableAria] Disable readspeaker assistance
   * @param {string} [options.progressText] A progress text for describing
   *  current progress out of total progress for readspeakers.
   *  e.g. "Slide :num of :total"
   * @return {H5P.JoubelProgressbar}
   */
  JoubelUI.createProgressbar = function (numSteps, options) {
    return new H5P.JoubelProgressbar(numSteps, options);
  };

  /**
   * Create standard Joubel button
   *
   * @method H5P.JoubelUI.createButton
   * @param {object} params
   *  May hold any properties allowed by jQuery. If href is set, an A tag
   *  is used, if not a button tag is used.
   * @return {H5P.jQuery} The jquery element created
   */
  JoubelUI.createButton = function(params) {
    var type = 'button';
    if (params.href) {
      type = 'a';
    }
    else {
      params.type = 'button';
    }
    if (params.class) {
      params.class += ' h5p-joubelui-button';
    }
    else {
      params.class = 'h5p-joubelui-button';
    }
    return $('<' + type + '/>', params);
  };

  /**
   * Fix for iframe scoll bug in IOS. When focusing an element that doesn't have
   * focus support by default the iframe will scroll the parent frame so that
   * the focused element is out of view. This varies dependening on the elements
   * of the parent frame.
   */
  if (H5P.isFramed && !H5P.hasiOSiframeScrollFix &&
      /iPad|iPhone|iPod/.test(navigator.userAgent)) {
    H5P.hasiOSiframeScrollFix = true;

    // Keep track of original focus function
    var focus = HTMLElement.prototype.focus;

    // Override the original focus
    HTMLElement.prototype.focus = function () {
      // Only focus the element if it supports it natively
      if ( (this instanceof HTMLAnchorElement ||
            this instanceof HTMLInputElement ||
            this instanceof HTMLSelectElement ||
            this instanceof HTMLTextAreaElement ||
            this instanceof HTMLButtonElement ||
            this instanceof HTMLIFrameElement ||
            this instanceof HTMLAreaElement) && // HTMLAreaElement isn't supported by Safari yet.
          !this.getAttribute('role')) { // Focus breaks if a different role has been set
          // In theory this.isContentEditable should be able to recieve focus,
          // but it didn't work when tested.

        // Trigger the original focus with the proper context
        focus.call(this);
      }
    };
  }

  return JoubelUI;
})(H5P.jQuery);
;H5P.Tooltip = H5P.Tooltip || function() {};

H5P.Question = (function ($, EventDispatcher, JoubelUI) {

  /**
   * Extending this class make it alot easier to create tasks for other
   * content types.
   *
   * @class H5P.Question
   * @extends H5P.EventDispatcher
   * @param {string} type
   */
  function Question(type) {
    var self = this;

    // Inheritance
    EventDispatcher.call(self);

    // Register default section order
    self.order = ['video', 'image', 'audio', 'introduction', 'content', 'explanation', 'feedback', 'scorebar', 'buttons', 'read'];

    // Keep track of registered sections
    var sections = {};

    // Buttons
    var buttons = {};
    var buttonOrder = [];

    // Wrapper when attached
    var $wrapper;

    // Click element
    var clickElement;

    // ScoreBar
    var scoreBar;

    // Keep track of the feedback's visual status.
    var showFeedback;

    // Keep track of which buttons are scheduled for hiding.
    var buttonsToHide = [];

    // Keep track of which buttons are scheduled for showing.
    var buttonsToShow = [];

    // Keep track of the hiding and showing of buttons.
    var toggleButtonsTimer;
    var toggleButtonsTransitionTimer;
    var buttonTruncationTimer;

    // Keeps track of initialization of question
    var initialized = false;

    /**
     * @type {Object} behaviour Behaviour of Question
     * @property {Boolean} behaviour.disableFeedback Set to true to disable feedback section
     */
    var behaviour = {
      disableFeedback: false,
      disableReadSpeaker: false
    };

    // Keeps track of thumb state
    var imageThumb = true;

    // Keeps track of image transitions
    var imageTransitionTimer;

    // Keep track of whether sections is transitioning.
    var sectionsIsTransitioning = false;

    // Keep track of auto play state
    var disableAutoPlay = false;

    // Feedback transition timer
    var feedbackTransitionTimer;

    // Used when reading messages to the user
    var $read, readText;

    /**
     * Register section with given content.
     *
     * @private
     * @param {string} section ID of the section
     * @param {(string|H5P.jQuery)} [content]
     */
    var register = function (section, content) {
      sections[section] = {};
      var $e = sections[section].$element = $('<div/>', {
        'class': 'h5p-question-' + section,
      });
      if (content) {
        $e[content instanceof $ ? 'append' : 'html'](content);
      }
    };

    /**
     * Update registered section with content.
     *
     * @private
     * @param {string} section ID of the section
     * @param {(string|H5P.jQuery)} content
     */
    var update = function (section, content) {
      if (content instanceof $) {
        sections[section].$element.html('').append(content);
      }
      else {
        sections[section].$element.html(content);
      }
    };

    /**
     * Insert element with given ID into the DOM.
     *
     * @private
     * @param {array|Array|string[]} order
     * List with ordered element IDs
     * @param {string} id
     * ID of the element to be inserted
     * @param {Object} elements
     * Maps ID to the elements
     * @param {H5P.jQuery} $container
     * Parent container of the elements
     */
    var insert = function (order, id, elements, $container) {
      // Try to find an element id should be after
      for (var i = 0; i < order.length; i++) {
        if (order[i] === id) {
          // Found our pos
          while (i > 0 &&
          (elements[order[i - 1]] === undefined ||
          !elements[order[i - 1]].isVisible)) {
            i--;
          }
          if (i === 0) {
            // We are on top.
            elements[id].$element.prependTo($container);
          }
          else {
            // Add after element
            elements[id].$element.insertAfter(elements[order[i - 1]].$element);
          }
          elements[id].isVisible = true;
          break;
        }
      }
    };

    /**
     * Make feedback into a popup and position relative to click.
     *
     * @private
     * @param {string} [closeText] Text for the close button
     */
    var makeFeedbackPopup = function (closeText) {
      var $element = sections.feedback.$element;
      var $parent = sections.content.$element;
      var $click = (clickElement != null ? clickElement.$element : null);

      $element.appendTo($parent).addClass('h5p-question-popup');

      if (sections.scorebar) {
        sections.scorebar.$element.appendTo($element);
      }

      $parent.addClass('h5p-has-question-popup');

      // Draw the tail
      var $tail = $('<div/>', {
        'class': 'h5p-question-feedback-tail'
      }).hide()
        .appendTo($parent);

      // Draw the close button
      var $close = $('<div/>', {
        'class': 'h5p-question-feedback-close',
        'tabindex': 0,
        'title': closeText,
        on: {
          click: function (event) {
            $element.remove();
            $tail.remove();
            event.preventDefault();
          },
          keydown: function (event) {
            switch (event.which) {
              case 13: // Enter
              case 32: // Space
                $element.remove();
                $tail.remove();
                event.preventDefault();
            }
          }
        }
      }).hide().appendTo($element);

      if ($click != null) {
        if ($click.hasClass('correct')) {
          $element.addClass('h5p-question-feedback-correct');
          $close.show();
          sections.buttons.$element.hide();
        }
        else {
          sections.buttons.$element.appendTo(sections.feedback.$element);
        }
      }

      positionFeedbackPopup($element, $click);
    };

    /**
     * Position the feedback popup.
     *
     * @private
     * @param {H5P.jQuery} $element Feedback div
     * @param {H5P.jQuery} $click Visual click div
     */
    var positionFeedbackPopup = function ($element, $click) {
      var $container = $element.parent();
      var $tail = $element.siblings('.h5p-question-feedback-tail');
      var popupWidth = $element.outerWidth();
      var popupHeight = setElementHeight($element);
      var space = 15;
      var disableTail = false;
      var positionY = $container.height() / 2 - popupHeight / 2;
      var positionX = $container.width() / 2 - popupWidth / 2;
      var tailX = 0;
      var tailY = 0;
      var tailRotation = 0;

      if ($click != null) {
        // Edge detection for click, takes space into account
        var clickNearTop = ($click[0].offsetTop < space);
        var clickNearBottom = ($click[0].offsetTop + $click.height() > $container.height() - space);
        var clickNearLeft = ($click[0].offsetLeft < space);
        var clickNearRight = ($click[0].offsetLeft + $click.width() > $container.width() - space);

        // Click is not in a corner or close to edge, calculate position normally
        positionX = $click[0].offsetLeft - popupWidth / 2  + $click.width() / 2;
        positionY = $click[0].offsetTop - popupHeight - space;
        tailX = positionX + popupWidth / 2 - $tail.width() / 2;
        tailY = positionY + popupHeight - ($tail.height() / 2);
        tailRotation = 225;

        // If popup is outside top edge, position under click instead
        if (popupHeight + space > $click[0].offsetTop) {
          positionY = $click[0].offsetTop + $click.height() + space;
          tailY = positionY - $tail.height() / 2 ;
          tailRotation = 45;
        }

        // If popup is outside left edge, position left
        if (positionX < 0) {
          positionX = 0;
        }

        // If popup is outside right edge, position right
        if (positionX + popupWidth > $container.width()) {
          positionX = $container.width() - popupWidth;
        }

        // Special cases such as corner clicks, or close to an edge, they override X and Y positions if met
        if (clickNearTop && (clickNearLeft || clickNearRight)) {
          positionX = $click[0].offsetLeft + (clickNearLeft ? $click.width() : -popupWidth);
          positionY = $click[0].offsetTop + $click.height();
          disableTail = true;
        }
        else if (clickNearBottom && (clickNearLeft || clickNearRight)) {
          positionX = $click[0].offsetLeft + (clickNearLeft ? $click.width() : -popupWidth);
          positionY = $click[0].offsetTop - popupHeight;
          disableTail = true;
        }
        else if (!clickNearTop && !clickNearBottom) {
          if (clickNearLeft || clickNearRight) {
            positionY = $click[0].offsetTop - popupHeight / 2 + $click.width() / 2;
            positionX = $click[0].offsetLeft + (clickNearLeft ? $click.width() + space : -popupWidth + -space);
            // Make sure this does not position the popup off screen
            if (positionX < 0) {
              positionX = 0;
              disableTail = true;
            }
            else {
              tailX = positionX + (clickNearLeft ? - $tail.width() / 2 : popupWidth - $tail.width() / 2);
              tailY = positionY + popupHeight / 2 - $tail.height() / 2;
              tailRotation = (clickNearLeft ? 315 : 135);
            }
          }
        }

        // Contain popup from overflowing bottom edge
        if (positionY + popupHeight > $container.height()) {
          positionY = $container.height() - popupHeight;

          if (popupHeight > $container.height() - ($click[0].offsetTop + $click.height() + space)) {
            disableTail = true;
          }
        }
      }
      else {
        disableTail = true;
      }

      // Contain popup from ovreflowing top edge
      if (positionY < 0) {
        positionY = 0;
      }

      $element.css({top: positionY, left: positionX});
      $tail.css({top: tailY, left: tailX});

      if (!disableTail) {
        $tail.css({
          'left': tailX,
          'top': tailY,
          'transform': 'rotate(' + tailRotation + 'deg)'
        }).show();
      }
      else {
        $tail.hide();
      }
    };

    /**
     * Set element max height, used for animations.
     *
     * @param {H5P.jQuery} $element
     */
    var setElementHeight = function ($element) {
      if (!$element.is(':visible')) {
        // No animation
        $element.css('max-height', 'none');
        return;
      }

      // If this element is shown in the popup, we can't set width to 100%,
      // since it already has a width set in CSS
      var isFeedbackPopup = $element.hasClass('h5p-question-popup');

      // Get natural element height
      var $tmp = $element.clone()
        .css({
          'position': 'absolute',
          'max-height': 'none',
          'width': isFeedbackPopup ? '' : '100%'
        })
        .appendTo($element.parent());

      // Need to take margins into account when calculating available space
      var sideMargins = parseFloat($element.css('margin-left'))
        + parseFloat($element.css('margin-right'));
      var tmpElWidth = $tmp.css('width') ? $tmp.css('width') : '100%';
      $tmp.css('width', 'calc(' + tmpElWidth + ' - ' + sideMargins + 'px)');

      // Apply height to element
      var h = Math.round($tmp.get(0).getBoundingClientRect().height);
      var fontSize = parseFloat($element.css('fontSize'));
      var relativeH = h / fontSize;
      $element.css('max-height', relativeH + 'em');
      $tmp.remove();

      if (h > 0 && sections.buttons && sections.buttons.$element === $element) {
        // Make sure buttons section is visible
        showSection(sections.buttons);

        // Resize buttons after resizing button section
        setTimeout(resizeButtons, 150);
      }
      return h;
    };

    /**
     * Does the actual job of hiding the buttons scheduled for hiding.
     *
     * @private
     * @param {boolean} [relocateFocus] Find a new button to focus
     */
    var hideButtons = function (relocateFocus) {
      for (var i = 0; i < buttonsToHide.length; i++) {
        hideButton(buttonsToHide[i].id);
      }
      buttonsToHide = [];

      if (relocateFocus) {
        self.focusButton();
      }
    };

    /**
     * Does the actual hiding.
     * @private
     * @param {string} buttonId
     */
    var hideButton = function (buttonId) {
      // Using detach() vs hide() makes it harder to cheat.
      buttons[buttonId].$element.detach();
      buttons[buttonId].isVisible = false;
    };

    /**
     * Shows the buttons on the next tick. This is to avoid buttons flickering
     * If they're both added and removed on the same tick.
     *
     * @private
     */
    var toggleButtons = function () {
      // If no buttons section, return
      if (sections.buttons === undefined) {
        return;
      }

      // Clear transition timer, reevaluate if buttons will be detached
      clearTimeout(toggleButtonsTransitionTimer);

      // Show buttons
      for (var i = 0; i < buttonsToShow.length; i++) {
        insert(buttonOrder, buttonsToShow[i].id, buttons, sections.buttons.$element);
        buttons[buttonsToShow[i].id].isVisible = true;
      }
      buttonsToShow = [];

      // Hide buttons
      var numToHide = 0;
      var relocateFocus = false;
      for (var j = 0; j < buttonsToHide.length; j++) {
        var button = buttons[buttonsToHide[j].id];
        if (button.isVisible) {
          numToHide += 1;
        }
        if (button.$element.is(':focus')) {
          // Move focus to the first visible button.
          relocateFocus = true;
        }
      }

      var animationTimer = 150;
      if (sections.feedback && sections.feedback.$element.hasClass('h5p-question-popup')) {
        animationTimer = 0;
      }

      if (numToHide === sections.buttons.$element.children().length) {
        // All buttons are going to be hidden. Hide container using transition.
        hideSection(sections.buttons);
        // Detach buttons
        hideButtons(relocateFocus);
      }
      else {
        hideButtons(relocateFocus);

        // Show button section
        if (!sections.buttons.$element.is(':empty')) {
          showSection(sections.buttons);
          setElementHeight(sections.buttons.$element);

          // Trigger resize after animation
          toggleButtonsTransitionTimer = setTimeout(function () {
            self.trigger('resize');
          }, animationTimer);
        }

        // Resize buttons to fit container
        resizeButtons();
      }

      toggleButtonsTimer = undefined;
    };

    /**
     * Allows for scaling of the question image.
     */
    var scaleImage = function () {
      var $imgSection = sections.image.$element;
      clearTimeout(imageTransitionTimer);

      // Add this here to avoid initial transition of the image making
      // content overflow. Alternatively we need to trigger a resize.
      $imgSection.addClass('animatable');

      if (imageThumb) {

        // Expand image
        $(this).attr('aria-expanded', true);
        $imgSection.addClass('h5p-question-image-fill-width');
        imageThumb = false;

        imageTransitionTimer = setTimeout(function () {
          self.trigger('resize');
        }, 600);
      }
      else {

        // Scale down image
        $(this).attr('aria-expanded', false);
        $imgSection.removeClass('h5p-question-image-fill-width');
        imageThumb = true;

        imageTransitionTimer = setTimeout(function () {
          self.trigger('resize');
        }, 600);
      }
    };

    /**
     * Get scrollable ancestor of element
     *
     * @private
     * @param {H5P.jQuery} $element
     * @param {Number} [currDepth=0] Current recursive calls to ancestor, stop at maxDepth
     * @param {Number} [maxDepth=5] Maximum depth for finding ancestor.
     * @returns {H5P.jQuery} Parent element that is scrollable
     */
    var findScrollableAncestor = function ($element, currDepth, maxDepth) {
      if (!currDepth) {
        currDepth = 0;
      }
      if (!maxDepth) {
        maxDepth = 5;
      }
      // Check validation of element or if we have reached document root
      if (!$element || !($element instanceof $) || document === $element.get(0) || currDepth >= maxDepth) {
        return;
      }

      if ($element.css('overflow-y') === 'auto') {
        return $element;
      }
      else {
        return findScrollableAncestor($element.parent(), currDepth + 1, maxDepth);
      }
    };

    /**
     * Scroll to bottom of Question.
     *
     * @private
     */
    var scrollToBottom = function () {
      if (!$wrapper || ($wrapper.hasClass('h5p-standalone') && !H5P.isFullscreen)) {
        return; // No scroll
      }

      var scrollableAncestor = findScrollableAncestor($wrapper);

      // Scroll to bottom of scrollable ancestor
      if (scrollableAncestor) {
        scrollableAncestor.animate({
          scrollTop: $wrapper.css('height')
        }, "slow");
      }
    };

    /**
     * Resize buttons to fit container width
     *
     * @private
     */
    var resizeButtons = function () {
      if (!buttons || !sections.buttons) {
        return;
      }

      var go = function () {
        // Don't do anything if button elements are not visible yet
        if (!sections.buttons.$element.is(':visible')) {
          return;
        }

        // Width of all buttons
        var buttonsWidth = {
          max: 0,
          min: 0,
          current: 0
        };

        for (var i in buttons) {
          var button = buttons[i];
          if (button.isVisible) {
            setButtonWidth(buttons[i]);
            buttonsWidth.max += button.width.max;
            buttonsWidth.min += button.width.min;
            buttonsWidth.current += button.isTruncated ? button.width.min : button.width.max;
          }
        }

        var makeButtonsFit = function (availableWidth) {
          if (buttonsWidth.max < availableWidth) {
            // It is room for everyone on the right side of the score bar (without truncating)
            if (buttonsWidth.max !== buttonsWidth.current) {
              // Need to make everyone big
              restoreButtonLabels(buttonsWidth.current, availableWidth);
            }
            return true;
          }
          else if (buttonsWidth.min < availableWidth) {
            // Is it room for everyone on the right side of the score bar with truncating?
            if (buttonsWidth.current > availableWidth) {
              removeButtonLabels(buttonsWidth.current, availableWidth);
            }
            else {
              restoreButtonLabels(buttonsWidth.current, availableWidth);
            }
            return true;
          }
          return false;
        };

        toggleFullWidthScorebar(false);

        var buttonSectionWidth = Math.floor(sections.buttons.$element.width()) - 1;

        if (!makeButtonsFit(buttonSectionWidth)) {
          // If we get here we need to wrap:
          toggleFullWidthScorebar(true);
          buttonSectionWidth = Math.floor(sections.buttons.$element.width()) - 1;
          makeButtonsFit(buttonSectionWidth);
        }
      };

      // If visible, resize right away
      if (sections.buttons.$element.is(':visible')) {
        go();
      }
      else { // If not visible, try on the next tick
        // Clear button truncation timer if within a button truncation function
        if (buttonTruncationTimer) {
          clearTimeout(buttonTruncationTimer);
        }
        buttonTruncationTimer = setTimeout(function () {
          buttonTruncationTimer = undefined;
          go();
        }, 0);
      }
    };

    var toggleFullWidthScorebar = function (enabled) {
      if (sections.scorebar &&
          sections.scorebar.$element &&
          sections.scorebar.$element.hasClass('h5p-question-visible')) {
        sections.buttons.$element.addClass('has-scorebar');
        sections.buttons.$element.toggleClass('wrap', enabled);
        sections.scorebar.$element.toggleClass('full-width', enabled);
      }
      else {
        sections.buttons.$element.removeClass('has-scorebar');
      }
    };

    /**
     * Remove button labels until they use less than max width.
     *
     * @private
     * @param {Number} buttonsWidth Total width of all buttons
     * @param {Number} maxButtonsWidth Max width allowed for buttons
     */
    var removeButtonLabels = function (buttonsWidth, maxButtonsWidth) {
      // Reverse traversal
      for (var i = buttonOrder.length - 1; i >= 0; i--) {
        var buttonId = buttonOrder[i];
        var button = buttons[buttonId];
        if (!button.isTruncated && button.isVisible) {
          var $button = button.$element;
          buttonsWidth -= button.width.max - button.width.min;
          // Set tooltip (needed by H5P.Tooltip)
          let buttonText = $button.text();
          $button.attr('data-tooltip', buttonText);

          // Use button text as aria label if a specific one isn't provided
          if (!button.ariaLabel) {
            $button.attr('aria-label', buttonText);
          }
          // Remove label
          $button.html('').addClass('truncated');
          button.isTruncated = true;
          if (buttonsWidth <= maxButtonsWidth) {
            // Buttons are small enough.
            return;
          }
        }
      }
    };

    /**
     * Restore button labels until it fills maximum possible width without exceeding the max width.
     *
     * @private
     * @param {Number} buttonsWidth Total width of all buttons
     * @param {Number} maxButtonsWidth Max width allowed for buttons
     */
    var restoreButtonLabels = function (buttonsWidth, maxButtonsWidth) {
      for (var i = 0; i < buttonOrder.length; i++) {
        var buttonId = buttonOrder[i];
        var button = buttons[buttonId];
        if (button.isTruncated && button.isVisible) {
          // Calculate new total width of buttons with a static pixel for consistency cross-browser
          buttonsWidth += button.width.max - button.width.min + 1;

          if (buttonsWidth > maxButtonsWidth) {
            return;
          }
          // Restore label
          button.$element.html(button.text);

          // Remove tooltip (used by H5P.Tooltip)
          button.$element.removeAttr('data-tooltip');

          // Remove aria-label if a specific one isn't provided
          if (!button.ariaLabel) {
            button.$element.removeAttr('aria-label');
          }

          button.$element.removeClass('truncated');
          button.isTruncated = false;
        }
      }
    };

    /**
     * Helper function for finding index of keyValue in array
     *
     * @param {String} keyValue Value to be found
     * @param {String} key In key
     * @param {Array} array In array
     * @returns {number}
     */
    var existsInArray = function (keyValue, key, array) {
      var i;
      for (i = 0; i < array.length; i++) {
        if (array[i][key] === keyValue) {
          return i;
        }
      }
      return -1;
    };

    /**
     * Show a section
     * @param {Object} section
     */
    var showSection = function (section) {
      section.$element.addClass('h5p-question-visible');
      section.isVisible = true;
    };

    /**
     * Hide a section
     * @param {Object} section
     */
    var hideSection = function (section) {
      section.$element.css('max-height', '');
      section.isVisible = false;

      setTimeout(function () {
        // Only hide if section hasn't been set to visible in the meantime
        if (!section.isVisible) {
          section.$element.removeClass('h5p-question-visible');
        }
      }, 150);
    };

    /**
     * Set behaviour for question.
     *
     * @param {Object} options An object containing behaviour that will be extended by Question
     */
    self.setBehaviour = function (options) {
      $.extend(behaviour, options);
    };

    /**
     * A video to display above the task.
     *
     * @param {object} params
     */
    self.setVideo = function (params) {
      sections.video = {
        $element: $('<div/>', {
          'class': 'h5p-question-video'
        })
      };

      if (disableAutoPlay && params.params.playback) {
        params.params.playback.autoplay = false;
      }

      // Never fit to wrapper
      if (!params.params.visuals) {
        params.params.visuals = {};
      }
      params.params.visuals.fit = false;
      sections.video.instance = H5P.newRunnable(params, self.contentId, sections.video.$element, true);
      var fromVideo = false; // Hack to avoid never ending loop
      sections.video.instance.on('resize', function () {
        fromVideo = true;
        self.trigger('resize');
        fromVideo = false;
      });
      self.on('resize', function () {
        if (!fromVideo) {
          sections.video.instance.trigger('resize');
        }
      });

      return self;
    };

    /**
     * An audio player to display above the task.
     *
     * @param {object} params
     */
    self.setAudio = function (params) {
      params.params = params.params || {};

      sections.audio = {
        $element: $('<div/>', {
          'class': 'h5p-question-audio',
        })
      };

      if (disableAutoPlay) {
        params.params.autoplay = false;
      }
      else if (params.params.playerMode === 'transparent') {
        params.params.autoplay = true; // false doesn't make sense for transparent audio
      }

      sections.audio.instance = H5P.newRunnable(params, self.contentId, sections.audio.$element, true);
      // The height value that is set by H5P.Audio is counter-productive here.
      if (sections.audio.instance.audio) {
        sections.audio.instance.audio.style.height = '';
      }

      return self;
    };

    /**
     * Will stop any playback going on in the task.
     */
    self.pause = function () {
      if (sections.video && sections.video.isVisible) {
        sections.video.instance.pause();
      }
      if (sections.audio && sections.audio.isVisible) {
        sections.audio.instance.pause();
      }
    };

    /**
     * Start playback of video
     */
    self.play = function () {
      if (sections.video && sections.video.isVisible) {
        sections.video.instance.play();
      }
      if (sections.audio && sections.audio.isVisible) {
        sections.audio.instance.play();
      }
    };

    /**
     * Disable auto play, useful in editors.
     */
    self.disableAutoPlay = function () {
      disableAutoPlay = true;
    };

    /**
     * Process HTML escaped string for use as attribute value,
     * e.g. for alt text or title attributes.
     *
     * @param {string} value
     * @return {string} WARNING! Do NOT use for innerHTML.
     */
    self.massageAttributeOutput = function (value) {
      const dparser = new DOMParser().parseFromString(value, 'text/html');
      const div = document.createElement('div');
      div.innerHTML = dparser.documentElement.textContent;;
      return div.textContent || div.innerText || '';
    };

    /**
     * Add task image.
     *
     * @param {string} path Relative
     * @param {Object} [options] Options object
     * @param {string} [options.alt] Text representation
     * @param {string} [options.title] Hover text
     * @param {Boolean} [options.disableImageZooming] Set as true to disable image zooming
     * @param {string} [options.expandImage] Localization strings
     * @param {string} [options.minimizeImage] Localization string

     */
    self.setImage = function (path, options) {
      options = options ? options : {};
      sections.image = {};
      // Image container
      sections.image.$element = $('<div/>', {
        'class': 'h5p-question-image h5p-question-image-fill-width'
      });

      // Inner wrap
      var $imgWrap = $('<div/>', {
        'class': 'h5p-question-image-wrap',
        appendTo: sections.image.$element
      });

      // Image element
      var $img = $('<img/>', {
        src: H5P.getPath(path, self.contentId),
        alt: (options.alt === undefined ? '' : self.massageAttributeOutput(options.alt)),
        title: (options.title === undefined ? '' : self.massageAttributeOutput(options.title)),
        on: {
          load: function () {
            self.trigger('imageLoaded', this);
            self.trigger('resize');
          }
        },
        appendTo: $imgWrap
      });

      // Disable image zooming
      if (options.disableImageZooming) {
        $img.css('maxHeight', 'none');

        // Make sure we are using the correct amount of width at all times
        var determineImgWidth = function () {

          // Remove margins if natural image width is bigger than section width
          var imageSectionWidth = sections.image.$element.get(0).getBoundingClientRect().width;

          // Do not transition, for instant measurements
          $imgWrap.css({
            '-webkit-transition': 'none',
            'transition': 'none'
          });

          // Margin as translateX on both sides of image.
          var diffX = 2 * ($imgWrap.get(0).getBoundingClientRect().left -
            sections.image.$element.get(0).getBoundingClientRect().left);

          if ($img.get(0).naturalWidth >= imageSectionWidth - diffX) {
            sections.image.$element.addClass('h5p-question-image-fill-width');
          }
          else { // Use margin for small res images
            sections.image.$element.removeClass('h5p-question-image-fill-width');
          }

          // Reset transition rules
          $imgWrap.css({
            '-webkit-transition': '',
            'transition': ''
          });
        };

        // Determine image width
        if ($img.is(':visible')) {
          determineImgWidth();
        }
        else {
          $img.on('load', determineImgWidth);
        }

        // Skip adding zoom functionality
        return;
      }

      const setAriaLabel = () => {
        const ariaLabel = $imgWrap.attr('aria-expanded') === 'true'
          ? options.minimizeImage 
          : options.expandImage;
          
          $imgWrap.attr('aria-label', `${ariaLabel} ${options.alt}`);
        };

      var sizeDetermined = false;
      var determineSize = function () {
        if (sizeDetermined || !$img.is(':visible')) {
          return; // Try again next time.
        }

        $imgWrap.addClass('h5p-question-image-scalable')
          .attr('aria-expanded', false)
          .attr('role', 'button')
          .attr('tabIndex', '0')
          .on('click', function (event) {
            if (event.which === 1) {
              scaleImage.apply(this); // Left mouse button click
              setAriaLabel();
            }
          }).on('keypress', function (event) {
            if (event.which === 32) {
              event.preventDefault(); // Prevent default behaviour; page scroll down
              scaleImage.apply(this); // Space bar pressed
              setAriaLabel();
            }
          });

        setAriaLabel();

        sections.image.$element.removeClass('h5p-question-image-fill-width');

        sizeDetermined  = true; // Prevent any futher events
      };

      self.on('resize', determineSize);

      return self;
    };

    /**
     * Add the introduction section.
     *
     * @param {(string|H5P.jQuery)} content
     */
    self.setIntroduction = function (content) {
      register('introduction', content);

      return self;
    };

    /**
     * Add the content section.
     *
     * @param {(string|H5P.jQuery)} content
     * @param {Object} [options]
     * @param {string} [options.class]
     */
    self.setContent = function (content, options) {
      register('content', content);

      if (options && options.class) {
        sections.content.$element.addClass(options.class);
      }

      return self;
    };

    /**
     * Force readspeaker to read text. Useful when you have to use
     * setTimeout for animations.
     */
    self.read = function (content) {
      if (!$read) {
        return; // Not ready yet
      }

      if (readText) {
        // Combine texts if called multiple times
        readText += (readText.substr(-1, 1) === '.' ? ' ' : '. ') + content;
      }
      else {
        readText = content;
      }

      // Set text
      $read.html(readText);

      setTimeout(function () {
        // Stop combining when done reading
        readText = null;
        $read.html('');
      }, 100);
    };

    /**
     * Read feedback
     */
    self.readFeedback = function () {
      var invalidFeedback =
        behaviour.disableReadSpeaker ||
        !showFeedback ||
        !sections.feedback ||
        !sections.feedback.$element;

      if (invalidFeedback) {
        return;
      }

      var $feedbackText = $('.h5p-question-feedback-content-text', sections.feedback.$element);
      if ($feedbackText && $feedbackText.html() && $feedbackText.html().length) {
        self.read($feedbackText.html());
      }
    };

    /**
     * Remove feedback
     *
     * @return {H5P.Question}
     */
    self.removeFeedback = function () {

      clearTimeout(feedbackTransitionTimer);

      if (sections.feedback && showFeedback) {

        showFeedback = false;

        // Hide feedback & scorebar
        hideSection(sections.scorebar);
        hideSection(sections.feedback);

        sectionsIsTransitioning = true;

        // Detach after transition
        feedbackTransitionTimer = setTimeout(function () {
          // Avoiding Transition.onTransitionEnd since it will register multiple events, and there's no way to cancel it if the transition changes back to "show" while the animation is happening.
          if (!showFeedback) {
            sections.feedback.$element.children().detach();
            sections.scorebar.$element.children().detach();

            // Trigger resize after animation
            self.trigger('resize');
          }
          sectionsIsTransitioning = false;
          scoreBar.setScore(0);
        }, 150);

        if ($wrapper) {
          $wrapper.find('.h5p-question-feedback-tail').remove();
        }
      }

      return self;
    };

    /**
     * Set feedback message.
     *
     * @param {string} [content]
     * @param {number} score The score
     * @param {number} maxScore The maximum score for this question
     * @param {string} [scoreBarLabel] Makes it easier for readspeakers to identify the scorebar
     * @param {string} [helpText] Help text that describes the score inside a tip icon
     * @param {object} [popupSettings] Extra settings for popup feedback
     * @param {boolean} [popupSettings.showAsPopup] Should the feedback display as popup?
     * @param {string} [popupSettings.closeText] Translation for close button text
     * @param {object} [popupSettings.click] Element representing where user clicked on screen
     */
    self.setFeedback = function (content, score, maxScore, scoreBarLabel, helpText, popupSettings, scoreExplanationButtonLabel) {
      // Feedback is disabled
      if (behaviour.disableFeedback) {
        return self;
      }

      // Need to toggle buttons right away to avoid flickering/blinking
      // Note: This means content types should invoke hide/showButton before setFeedback
      toggleButtons();

      clickElement = (popupSettings != null && popupSettings.click != null ? popupSettings.click : null);
      clearTimeout(feedbackTransitionTimer);

      var $feedback = $('<div>', {
        'class': 'h5p-question-feedback-container'
      });

      var $feedbackContent = $('<div>', {
        'class': 'h5p-question-feedback-content'
      }).appendTo($feedback);

      // Feedback text
      $('<div>', {
        'class': 'h5p-question-feedback-content-text',
        'html': content
      }).appendTo($feedbackContent);

      var $scorebar = $('<div>', {
        'class': 'h5p-question-scorebar-container'
      });
      if (scoreBar === undefined) {
        scoreBar = JoubelUI.createScoreBar(maxScore, scoreBarLabel, helpText, scoreExplanationButtonLabel);
      }
      scoreBar.appendTo($scorebar);

      $feedbackContent.toggleClass('has-content', content !== undefined && content.length > 0);

      // Feedback for readspeakers
      if (!behaviour.disableReadSpeaker && scoreBarLabel) {
        self.read(scoreBarLabel.replace(':num', score).replace(':total', maxScore) + '. ' + (content ? content : ''));
      }

      showFeedback = true;
      if (sections.feedback) {
        // Update section
        update('feedback', $feedback);
        update('scorebar', $scorebar);
      }
      else {
        // Create section
        register('feedback', $feedback);
        register('scorebar', $scorebar);
        if (initialized && $wrapper) {
          insert(self.order, 'feedback', sections, $wrapper);
          insert(self.order, 'scorebar', sections, $wrapper);
        }
      }

      showSection(sections.feedback);
      showSection(sections.scorebar);

      resizeButtons();

      if (popupSettings != null && popupSettings.showAsPopup == true) {
        makeFeedbackPopup(popupSettings.closeText);
        scoreBar.setScore(score);
      }
      else {
        // Show feedback section
        feedbackTransitionTimer = setTimeout(function () {
          setElementHeight(sections.feedback.$element);
          setElementHeight(sections.scorebar.$element);
          sectionsIsTransitioning = true;

          // Scroll to bottom after showing feedback
          scrollToBottom();

          // Trigger resize after animation
          feedbackTransitionTimer = setTimeout(function () {
            sectionsIsTransitioning = false;
            self.trigger('resize');
            scoreBar.setScore(score);
          }, 150);
        }, 0);
      }

      return self;
    };

    /**
     * Set feedback content (no animation).
     *
     * @param {string} content
     * @param {boolean} [extendContent] True will extend content, instead of replacing it
     */
    self.updateFeedbackContent = function (content, extendContent) {
      if (sections.feedback && sections.feedback.$element) {

        if (extendContent) {
          content = $('.h5p-question-feedback-content', sections.feedback.$element).html() + ' ' + content;
        }

        // Update feedback content html
        $('.h5p-question-feedback-content', sections.feedback.$element).html(content).addClass('has-content');

        // Make sure the height is correct
        setElementHeight(sections.feedback.$element);

        // Need to trigger resize when feedback has finished transitioning
        setTimeout(self.trigger.bind(self, 'resize'), 150);
      }

      return self;
    };

    /**
     * Set the content of the explanation / feedback panel
     *
     * @param {Object} data
     * @param {string} data.correct
     * @param {string} data.wrong
     * @param {string} data.text
     * @param {string} title Title for explanation panel
     *
     * @return {H5P.Question}
     */
    self.setExplanation = function (data, title) {
      if (data) {
        var explainer = new H5P.Question.Explainer(title, data);

        if (sections.explanation) {
          // Update section
          update('explanation', explainer.getElement());
        }
        else {
          register('explanation', explainer.getElement());

          if (initialized && $wrapper) {
            insert(self.order, 'explanation', sections, $wrapper);
          }
        }
      }
      else if (sections.explanation) {
        // Hide explanation section
        sections.explanation.$element.children().detach();
      }

      return self;
    };

    /**
     * Checks to see if button is registered.
     *
     * @param {string} id
     * @returns {boolean}
     */
    self.hasButton = function (id) {
      return (buttons[id] !== undefined);
    };

    /**
     * @typedef {Object} ConfirmationDialog
     * @property {boolean} [enable] Must be true to show confirmation dialog
     * @property {Object} [instance] Instance that uses confirmation dialog
     * @property {jQuery} [$parentElement] Append to this element.
     * @property {Object} [l10n] Translatable fields
     * @property {string} [l10n.header] Header text
     * @property {string} [l10n.body] Body text
     * @property {string} [l10n.cancelLabel]
     * @property {string} [l10n.confirmLabel]
     */

    /**
     * Register buttons for the task.
     *
     * @param {string} id
     * @param {string} text label
     * @param {function} clicked
     * @param {boolean} [visible=true]
     * @param {Object} [options] Options for button
     * @param {Object} [extras] Extra options
     * @param {ConfirmationDialog} [extras.confirmationDialog] Confirmation dialog
     * @param {Object} [extras.contentData] Content data
     * @params {string} [extras.textIfSubmitting] Text to display if submitting
     */
    self.addButton = function (id, text, clicked, visible, options, extras) {
      if (buttons[id]) {
        return self; // Already registered
      }

      if (sections.buttons === undefined)  {
        // We have buttons, register wrapper
        register('buttons');
        if (initialized) {
          insert(self.order, 'buttons', sections, $wrapper);
        }
      }

      extras = extras || {};
      extras.confirmationDialog = extras.confirmationDialog || {};
      options = options || {};

      var confirmationDialog =
        self.addConfirmationDialogToButton(extras.confirmationDialog, clicked);

      /**
       * Handle button clicks through both mouse and keyboard
       * @private
       */
      var handleButtonClick = function () {
        if (extras.confirmationDialog.enable && confirmationDialog) {
          // Show popups section if used
          if (!extras.confirmationDialog.$parentElement) {
            sections.popups.$element.removeClass('hidden');
          }
          confirmationDialog.show($e.position().top);
        }
        else {
          clicked();
        }
      };

      const isSubmitting = extras.contentData && extras.contentData.standalone
        && (extras.contentData.isScoringEnabled || extras.contentData.isReportingEnabled);

      if (isSubmitting && extras.textIfSubmitting) {
        text = extras.textIfSubmitting;
      }

      buttons[id] = {
        isTruncated: false,
        text: text,
        isVisible: false,
        ariaLabel: options['aria-label']
      };

      // The button might be <button> or <a>
      // (dependent on options.href set or not)
      var isAnchorTag = (options.href !== undefined);
      var $e = buttons[id].$element = JoubelUI.createButton($.extend({
        'class': 'h5p-question-' + id,
        html: text,
        on: {
          click: function (event) {
            handleButtonClick();
            if (isAnchorTag) {
              event.preventDefault();
            }
          }
        }
      }, options));
      buttonOrder.push(id);

      H5P.Tooltip($e.get(0), {tooltipSource: 'data-tooltip'});

      // The button might be <button> or <a>. If <a>, the space key is not
      // triggering the click event, must therefore handle this here:
      if (isAnchorTag) {
        $e.on('keypress', function (event) {
          if (event.which === 32) { // Space
            handleButtonClick();
            event.preventDefault();
          }
        });
      }

      if (visible === undefined || visible) {
        // Button should be visible
        $e.appendTo(sections.buttons.$element);
        buttons[id].isVisible = true;
        showSection(sections.buttons);
      }

      return self;
    };

    var setButtonWidth = function (button) {
      var $button = button.$element;
      var $tmp = $button.clone()
        .css({
          'position': 'absolute',
          'white-space': 'nowrap',
          'max-width': 'none'
        }).removeClass('truncated')
        .html(button.text)
        .appendTo($button.parent());

      // Calculate max width (button including text)
      button.width = {
        max: Math.ceil($tmp.outerWidth() + parseFloat($tmp.css('margin-left')) + parseFloat($tmp.css('margin-right')))
      };

      // Calculate min width (truncated, icon only)
      $tmp.html('').addClass('truncated');
      button.width.min = Math.ceil($tmp.outerWidth() + parseFloat($tmp.css('margin-left')) + parseFloat($tmp.css('margin-right')));
      $tmp.remove();
    };

    /**
     * Add confirmation dialog to button
     * @param {ConfirmationDialog} options
     *  A confirmation dialog that will be shown before click handler of button
     *  is triggered
     * @param {function} clicked
     *  Click handler of button
     * @return {H5P.ConfirmationDialog|undefined}
     *  Confirmation dialog if enabled
     */
    self.addConfirmationDialogToButton = function (options, clicked) {
      options = options || {};

      if (!options.enable) {
        return;
      }

      // Confirmation dialog
      var confirmationDialog = new H5P.ConfirmationDialog({
        instance: options.instance,
        headerText: options.l10n.header,
        dialogText: options.l10n.body,
        cancelText: options.l10n.cancelLabel,
        confirmText: options.l10n.confirmLabel
      });

      // Determine parent element
      if (options.$parentElement) {
        const parentElement = options.$parentElement.get(0);
        let dialogParent;
        // If using h5p-content, dialog will not appear on embedded fullscreen
        if (parentElement.classList.contains('h5p-content')) {
          dialogParent = parentElement.querySelector('.h5p-container');
        }

        confirmationDialog.appendTo(dialogParent ?? parentElement);
      }
      else {

        // Create popup section and append to that
        if (sections.popups === undefined) {
          register('popups');
          if (initialized) {
            insert(self.order, 'popups', sections, $wrapper);
          }
          sections.popups.$element.addClass('hidden');
          self.order.push('popups');
        }
        confirmationDialog.appendTo(sections.popups.$element.get(0));
      }

      // Add event listeners
      confirmationDialog.on('confirmed', function () {
        if (!options.$parentElement) {
          sections.popups.$element.addClass('hidden');
        }
        clicked();

        // Trigger to content type
        self.trigger('confirmed');
      });

      confirmationDialog.on('canceled', function () {
        if (!options.$parentElement) {
          sections.popups.$element.addClass('hidden');
        }
        // Trigger to content type
        self.trigger('canceled');
      });

      return confirmationDialog;
    };

    /**
     * Show registered button with given identifier.
     *
     * @param {string} id
     * @param {Number} [priority]
     */
    self.showButton = function (id, priority) {
      var aboutToBeHidden = existsInArray(id, 'id', buttonsToHide) !== -1;
      if (buttons[id] === undefined || (buttons[id].isVisible === true && !aboutToBeHidden)) {
        return self;
      }

      priority = priority || 0;

      // Skip if already being shown
      var indexToShow = existsInArray(id, 'id', buttonsToShow);
      if (indexToShow !== -1) {

        // Update priority
        if (buttonsToShow[indexToShow].priority < priority) {
          buttonsToShow[indexToShow].priority = priority;
        }

        return self;
      }

      // Check if button is going to be hidden on next tick
      var exists = existsInArray(id, 'id', buttonsToHide);
      if (exists !== -1) {

        // Skip hiding if higher priority
        if (buttonsToHide[exists].priority <= priority) {
          buttonsToHide.splice(exists, 1);
          buttonsToShow.push({id: id, priority: priority});
        }

      } // If button is not shown
      else if (!buttons[id].$element.is(':visible')) {

        // Show button on next tick
        buttonsToShow.push({id: id, priority: priority});
      }

      if (!toggleButtonsTimer) {
        toggleButtonsTimer = setTimeout(toggleButtons, 0);
      }

      return self;
    };

    /**
     * Hide registered button with given identifier.
     *
     * @param {string} id
     * @param {number} [priority]
     */
    self.hideButton = function (id, priority) {
      var aboutToBeShown = existsInArray(id, 'id', buttonsToShow) !== -1;
      if (buttons[id] === undefined || (buttons[id].isVisible === false && !aboutToBeShown)) {
        return self;
      }

      priority = priority || 0;

      // Skip if already being hidden
      var indexToHide = existsInArray(id, 'id', buttonsToHide);
      if (indexToHide !== -1) {

        // Update priority
        if (buttonsToHide[indexToHide].priority < priority) {
          buttonsToHide[indexToHide].priority = priority;
        }

        return self;
      }

      // Check if buttons is going to be shown on next tick
      var exists = existsInArray(id, 'id', buttonsToShow);
      if (exists !== -1) {

        // Skip showing if higher priority
        if (buttonsToShow[exists].priority <= priority) {
          buttonsToShow.splice(exists, 1);
          buttonsToHide.push({id: id, priority: priority});
        }
      }
      else if (!buttons[id].$element.is(':visible')) {

        // Make sure it is detached in case the container is hidden.
        hideButton(id);
      }
      else {

        // Hide button on next tick.
        buttonsToHide.push({id: id, priority: priority});
      }

      if (!toggleButtonsTimer) {
        toggleButtonsTimer = setTimeout(toggleButtons, 0);
      }

      return self;
    };

    /**
     * Set focus to the given button. If no button is given the first visible
     * button gets focused. This is useful if you lose focus.
     *
     * @param {string} [id]
     */
    self.focusButton = function (id) {
      if (id === undefined) {
        // Find first button that is visible.
        for (var i = 0; i < buttonOrder.length; i++) {
          var button = buttons[buttonOrder[i]];
          if (button && button.isVisible) {
            // Give that button focus
            button.$element.focus();
            break;
          }
        }
      }
      else if (buttons[id] && buttons[id].$element.is(':visible')) {
        // Set focus to requested button
        buttons[id].$element.focus();
      }

      return self;
    };

    /**
     * Toggle readspeaker functionality
     * @param {boolean} [disable] True to disable, false to enable.
     */
    self.toggleReadSpeaker = function (disable) {
      behaviour.disableReadSpeaker = disable || !behaviour.disableReadSpeaker;
    };

    /**
     * Set new element for section.
     *
     * @param {String} id
     * @param {H5P.jQuery} $element
     */
    self.insertSectionAtElement = function (id, $element) {
      if (sections[id] === undefined) {
        register(id);
      }
      sections[id].parent = $element;

      // Insert section if question is not initialized
      if (!initialized) {
        insert([id], id, sections, $element);
      }

      return self;
    };

    /**
     * Attach content to given container.
     *
     * @param {H5P.jQuery} $container
     */
    self.attach = function ($container) {
      if (self.isRoot()) {
        self.setActivityStarted();
      }

      // The first time we attach we also create our DOM elements.
      if ($wrapper === undefined) {
        if (self.registerDomElements !== undefined &&
           (self.registerDomElements instanceof Function ||
           typeof self.registerDomElements === 'function')) {

          // Give the question type a chance to register before attaching
          self.registerDomElements();
        }

        // Create section for reading messages
        $read = $('<div/>', {
          'aria-live': 'polite',
          'class': 'h5p-hidden-read'
        });
        register('read', $read);
        self.trigger('registerDomElements');
      }

      // Prepare container
      $wrapper = $container;
      $container.html('')
        .addClass('h5p-question h5p-' + type);

      // Add sections in given order
      var $sections = [];
      for (var i = 0; i < self.order.length; i++) {
        var section = self.order[i];
        if (sections[section]) {
          if (sections[section].parent) {
            // Section has a different parent
            sections[section].$element.appendTo(sections[section].parent);
          }
          else {
            $sections.push(sections[section].$element);
          }
          sections[section].isVisible = true;
        }
      }

      // Only append once to DOM for optimal performance
      $container.append($sections);

      // Let others react to dom changes
      self.trigger('domChanged', {
        '$target': $container,
        'library': self.libraryInfo.machineName,
        'contentId': self.contentId,
        'key': 'newLibrary'
      }, {'bubbles': true, 'external': true});

      // ??
      initialized = true;

      return self;
    };

    /**
     * Detach all sections from their parents
     */
    self.detachSections = function () {
      // Deinit Question
      initialized = false;

      // Detach sections
      for (var section in sections) {
        sections[section].$element.detach();
      }

      return self;
    };

    // Listen for resize
    self.on('resize', function () {
      // Allow elements to attach and set their height before resizing
      if (!sectionsIsTransitioning && sections.feedback && showFeedback) {
        // Resize feedback to fit
        setElementHeight(sections.feedback.$element);
      }

      // Re-position feedback popup if in use
      var $element = sections.feedback;
      var $click = clickElement;

      if ($element != null && $element.$element != null && $click != null && $click.$element != null) {
        setTimeout(function () {
          positionFeedbackPopup($element.$element, $click.$element);
        }, 10);
      }

      resizeButtons();
    });
  }

  // Inheritance
  Question.prototype = Object.create(EventDispatcher.prototype);
  Question.prototype.constructor = Question;

  /**
   * Determine the overall feedback to display for the question.
   * Returns empty string if no matching range is found.
   *
   * @param {Object[]} feedbacks
   * @param {number} scoreRatio
   * @return {string}
   */
  Question.determineOverallFeedback = function (feedbacks, scoreRatio) {
    scoreRatio = Math.floor(scoreRatio * 100);

    for (var i = 0; i < feedbacks.length; i++) {
      var feedback = feedbacks[i];
      var hasFeedback = (feedback.feedback !== undefined && feedback.feedback.trim().length !== 0);

      if (feedback.from <= scoreRatio && feedback.to >= scoreRatio && hasFeedback) {
        return feedback.feedback;
      }
    }

    return '';
  };

  return Question;
})(H5P.jQuery, H5P.EventDispatcher, H5P.JoubelUI);
;H5P.Question.Explainer = (function ($) {
  /**
   * Constructor
   *
   * @class
   * @param {string} title
   * @param {array} explanations
   */
  function Explainer(title, explanations) {
    var self = this;

    /**
     * Create the DOM structure
     */
    var createHTML = function () {
      self.$explanation = $('<div>', {
        'class': 'h5p-question-explanation-container'
      });

      // Add title:
      $('<div>', {
        'class': 'h5p-question-explanation-title',
        role: 'heading',
        html: title,
        appendTo: self.$explanation
      });

      var $explanationList = $('<ul>', {
        'class': 'h5p-question-explanation-list',
        appendTo: self.$explanation
      });

      for (var i = 0; i < explanations.length; i++) {
        var feedback = explanations[i];
        var $explanationItem = $('<li>', {
          'class': 'h5p-question-explanation-item',
          appendTo: $explanationList
        });

        var $content = $('<div>', {
          'class': 'h5p-question-explanation-status'
        });

        if (feedback.correct) {
          $('<span>', {
            'class': 'h5p-question-explanation-correct',
            html: feedback.correct,
            appendTo: $content
          });
        }
        if (feedback.wrong) {
          $('<span>', {
            'class': 'h5p-question-explanation-wrong',
            html: feedback.wrong,
            appendTo: $content
          });
        }
        $content.appendTo($explanationItem);

        if (feedback.text) {
          $('<div>', {
            'class': 'h5p-question-explanation-text',
            html: feedback.text,
            appendTo: $explanationItem
          });
        }
      }
    };

    createHTML();

    /**
     * Return the container HTMLElement
     *
     * @return {HTMLElement}
     */
    self.getElement = function () {
      return self.$explanation;
    };
  }

  return Explainer;

})(H5P.jQuery);
;(function (Question) {

  /**
   * Makes it easy to add animated score points for your question type.
   *
   * @class H5P.Question.ScorePoints
   */
  Question.ScorePoints = function () {
    var self = this;

    var elements = [];
    var showElementsTimer;

    /**
     * Create the element that displays the score point element for questions.
     *
     * @param {boolean} isCorrect
     * @return {HTMLElement}
     */
    self.getElement = function (isCorrect) {
      var element = document.createElement('div');
      element.classList.add(isCorrect ? 'h5p-question-plus-one' : 'h5p-question-minus-one');
      element.classList.add('h5p-question-hidden-one');
      elements.push(element);

      // Schedule display animation of all added elements
      if (showElementsTimer) {
        clearTimeout(showElementsTimer);
      }
      showElementsTimer = setTimeout(showElements, 0);

      return element;
    };

    /**
     * @private
     */
    var showElements = function () {
      // Determine delay between triggering animations
      var delay = 0;
      var increment = 150;
      var maxTime = 1000;

      if (elements.length && elements.length > Math.ceil(maxTime / increment)) {
        // Animations will run for more than ~1 second, reduce it.
        increment = maxTime / elements.length;
      }

      for (var i = 0; i < elements.length; i++) {
        // Use timer to trigger show
        setTimeout(showElement(elements[i]), delay);

        // Increse delay for next element
        delay += increment;
      }
    };

    /**
     * Trigger transition animation for the given element
     *
     * @private
     * @param {HTMLElement} element
     * @return {function}
     */
    var showElement = function (element) {
      return function () {
        element.classList.remove('h5p-question-hidden-one');
      };
    };
  };

})(H5P.Question);
;H5P.TrueFalse = (function ($, Question) {
  'use strict';

  // Maximum score for True False
  var MAX_SCORE = 1;

  /**
   * Enum containing the different states this content type can exist in
   *
   * @enum
   */
  var State = Object.freeze({
    ONGOING: 1,
    FINISHED_WRONG: 2,
    FINISHED_CORRECT: 3,
    INTERNAL_SOLUTION: 4,
    EXTERNAL_SOLUTION: 5
  });

  /**
   * Button IDs
   */
  var Button = Object.freeze({
    CHECK: 'check-answer',
    TRYAGAIN: 'try-again',
    SHOW_SOLUTION: 'show-solution'
  });

  /**
   * Initialize module.
   *
   * @class H5P.TrueFalse
   * @extends H5P.Question
   * @param {Object} options
   * @param {number} id Content identification
   * @param {Object} contentData Task specific content data
   */
  function TrueFalse(options, id, contentData) {
    var self = this;

    // Inheritance
    Question.call(self, 'true-false');

    var params = $.extend(true, {
      question: 'No question text provided',
      correct: 'true',
      l10n: {
        trueText: 'True',
        falseText: 'False',
        score: 'You got @score of @total points',
        checkAnswer: 'Check',
        submitAnswer: 'Submit',
        showSolutionButton: 'Show solution',
        tryAgain: 'Retry',
        wrongAnswerMessage: 'Wrong answer',
        correctAnswerMessage: 'Correct answer',
        scoreBarLabel: 'You got :num out of :total points',
        a11yCheck: 'Check the answers. The responses will be marked as correct, incorrect, or unanswered.',
        a11yShowSolution: 'Show the solution. The task will be marked with its correct solution.',
        a11yRetry: 'Retry the task. Reset all responses and start the task over again.',
      },
      behaviour: {
        enableRetry: true,
        enableSolutionsButton: true,
        enableCheckButton: true,
        confirmCheckDialog: false,
        confirmRetryDialog: false,
        autoCheck: false
      }
    }, options);

    // Counter used to create unique id for this question
    TrueFalse.counter = (TrueFalse.counter === undefined ? 0 : TrueFalse.counter + 1);

    // A unique ID is needed for aria label
    var domId = 'h5p-tfq' + H5P.TrueFalse.counter;

    // saves the content id
    this.contentId = id;
    this.contentData = contentData;

    // The radio group
    var answerGroup = new H5P.TrueFalse.AnswerGroup(domId, params.correct, params.l10n);
    if (contentData.previousState !== undefined && contentData.previousState.answer !== undefined) {
      answerGroup.check(contentData.previousState.answer);
    }
    answerGroup.on('selected', function () {
      self.triggerXAPI('interacted');

      if (params.behaviour.autoCheck) {
        checkAnswer();
        triggerXAPIAnswered();
      }
    });


    /**
     * Create the answers
     *
     * @method createAnswers
     * @private
     * @return {H5P.jQuery}
     */
    var createAnswers = function () {
      return answerGroup.getDomElement();
    };

    /**
     * Register buttons
     *
     * @method registerButtons
     * @private
     */
    var registerButtons = function () {
      var $content = $('[data-content-id="' + self.contentId + '"].h5p-content');
      var $containerParents = $content.parents('.h5p-container');

      // select find container to attach dialogs to
      var $container;
      if($containerParents.length !== 0) {
        // use parent highest up if any
        $container = $containerParents.last();
      }
      else if($content.length !== 0){
        $container = $content;
      }
      else  {
        $container = $(document.body);
      }

      // Show solution button
      if (params.behaviour.enableSolutionsButton === true) {
        self.addButton(Button.SHOW_SOLUTION, params.l10n.showSolutionButton, function () {
          self.showSolutions(true);
        }, false, {
          'aria-label': params.l10n.a11yShowSolution,
        });
      }

      // Check button
      if (!params.behaviour.autoCheck && params.behaviour.enableCheckButton) {
        self.addButton(Button.CHECK, params.l10n.checkAnswer, function () {
          checkAnswer();
          triggerXAPIAnswered();
        }, true, {
          'aria-label': params.l10n.a11yCheck
        }, {
          confirmationDialog: {
            enable: params.behaviour.confirmCheckDialog,
            l10n: params.confirmCheck,
            instance: self,
            $parentElement: $container
          },
          contentData: self.contentData,
          textIfSubmitting: params.l10n.submitAnswer,
        });
      }

      // Try again button
      if (params.behaviour.enableRetry === true) {
        self.addButton(Button.TRYAGAIN, params.l10n.tryAgain, function () {
          self.resetTask();
        }, true, {
          'aria-label': params.l10n.a11yRetry,
        }, {
          confirmationDialog: {
            enable: params.behaviour.confirmRetryDialog,
            l10n: params.confirmRetry,
            instance: self,
            $parentElement: $container
          }
        });
      }

      toggleButtonState(State.ONGOING);
    };

    /**
     * Creates and triggers the xAPI answered event
     *
     * @method triggerXAPIAnswered
     * @private
     * @fires xAPIEvent
     */
    var triggerXAPIAnswered = function () {
      var xAPIEvent = self.createXAPIEventTemplate('answered');
      addQuestionToXAPI(xAPIEvent);
      addResponseToXAPI(xAPIEvent);
      self.trigger(xAPIEvent);
    };

    /**
     * Add the question itself to the definition part of an xAPIEvent
     *
     * @method addQuestionToXAPI
     * @param {XAPIEvent} xAPIEvent
     * @private
     */
    var addQuestionToXAPI = function(xAPIEvent) {
      var definition = xAPIEvent.getVerifiedStatementValue(['object', 'definition']);
      definition.description = {
        // Remove tags, must wrap in div tag because jQuery 1.9 will crash if the string isn't wrapped in a tag.
        'en-US': $('<div>' + params.question + '</div>').text()
      };
      definition.type = 'http://adlnet.gov/expapi/activities/cmi.interaction';
      definition.interactionType = 'true-false';
      definition.correctResponsesPattern = [getCorrectAnswer()];
    };

    /**
     * Returns the correct answer
     *
     * @method getCorrectAnswer
     * @private
     * @return {String}
     */
    var getCorrectAnswer = function () {
      return (params.correct === 'true' ? 'true' : 'false');
    };

    /**
     * Returns the wrong answer
     *
     * @method getWrongAnswer
     * @private
     * @return {String}
     */
    var getWrongAnswer = function () {
      return (params.correct === 'false' ? 'true' : 'false');
    };

    /**
     * Add the response part to an xAPI event
     *
     * @method addResponseToXAPI
     * @private
     * @param {H5P.XAPIEvent} xAPIEvent
     *  The xAPI event we will add a response to
     */
    var addResponseToXAPI = function(xAPIEvent) {
      var isCorrect = answerGroup.isCorrect();
      xAPIEvent.setScoredResult(isCorrect ? MAX_SCORE : 0, MAX_SCORE, self, true, isCorrect);
      xAPIEvent.data.statement.result.response = (isCorrect ? getCorrectAnswer() : getWrongAnswer());
    };

    /**
     * Toggles btton visibility dependent of current state
     *
     * @method toggleButtonVisibility
     * @private
     * @param  {String}    buttonId
     * @param  {Boolean}   visible
     */
    var toggleButtonVisibility = function (buttonId, visible) {
      if (visible === true) {
        self.showButton(buttonId);
      }
      else {
        self.hideButton(buttonId);
      }
    };

    /**
     * Toggles buttons state
     *
     * @method toggleButtonState
     * @private
     * @param  {String}          state
     */
    var toggleButtonState = function (state) {
      toggleButtonVisibility(Button.SHOW_SOLUTION, state === State.FINISHED_WRONG);
      toggleButtonVisibility(Button.CHECK, state === State.ONGOING);
      toggleButtonVisibility(Button.TRYAGAIN, state === State.FINISHED_WRONG || state === State.INTERNAL_SOLUTION);
    };

    /**
     * Check if answer is correct or wrong, and update visuals accordingly
     *
     * @method checkAnswer
     * @private
     */
    var checkAnswer = function () {
      // Create feedback widget
      var score = self.getScore();
      var scoreText;

      toggleButtonState(score === MAX_SCORE ? State.FINISHED_CORRECT : State.FINISHED_WRONG);

      if (score === MAX_SCORE && params.behaviour.feedbackOnCorrect) {
        scoreText = params.behaviour.feedbackOnCorrect;
      }
      else if (score === 0 && params.behaviour.feedbackOnWrong) {
        scoreText = params.behaviour.feedbackOnWrong;
      }
      else {
        scoreText = params.l10n.score;
      }
      // Replace relevant variables:
      scoreText = scoreText.replace('@score', score).replace('@total', MAX_SCORE);
      self.setFeedback(scoreText, score, MAX_SCORE, params.l10n.scoreBarLabel);
      answerGroup.reveal();
    };

    /**
     * Registers this question type's DOM elements before they are attached.
     * Called from H5P.Question.
     *
     * @method registerDomElements
     * @private
     */
    self.registerDomElements = function () {
      var self = this;

      // Check for task media
      var media = params.media;
      if (media && media.type && media.type.library) {
        media = media.type;
        var type = media.library.split(' ')[0];
        if (type === 'H5P.Image') {
          if (media.params.file) {
            // Register task image
            self.setImage(media.params.file.path, {
              disableImageZooming: params.media.disableImageZooming || false,
              alt: media.params.alt,
              title: media.params.title,
              expandImage: media.params.expandImage,
              minimizeImage: media.params.minimizeImage
            });
          }
        }
        else if (type === 'H5P.Video') {
          if (media.params.sources) {
            // Register task video
            self.setVideo(media);
          }
        }
        else if (type === 'H5P.Audio') {
          if (media.params.files) {
            // Register task audio
            self.setAudio(media);
          }
        }
      }

      // Add task question text
      self.setIntroduction('<div id="' + domId + '">' + params.question + '</div>');

      // Register task content area
      self.$content = createAnswers();
      self.setContent(self.$content);

      // ... and buttons
      registerButtons();
    };

    /**
     * Implements resume (save content state)
     *
     * @method getCurrentState
     * @public
     * @returns {object} object containing answer
     */
    self.getCurrentState = function () {
      return {answer: answerGroup.getAnswer()};
    };

    /**
     * Used for contracts.
     * Checks if the parent program can proceed. Always true.
     *
     * @method getAnswerGiven
     * @public
     * @returns {Boolean} true
     */
    self.getAnswerGiven = function () {
      return answerGroup.hasAnswered();
    };

    /**
     * Used for contracts.
     * Checks the current score for this task.
     *
     * @method getScore
     * @public
     * @returns {Number} The current score.
     */
    self.getScore = function () {
      return answerGroup.isCorrect() ? MAX_SCORE : 0;
    };

    /**
     * Used for contracts.
     * Checks the maximum score for this task.
     *
     * @method getMaxScore
     * @public
     * @returns {Number} The maximum score.
     */
    self.getMaxScore = function () {
      return MAX_SCORE;
    };

    /**
     * Get title of task
     *
     * @method getTitle
     * @public
     * @returns {string} title
     */
    self.getTitle = function () {
      return H5P.createTitle((self.contentData && self.contentData.metadata && self.contentData.metadata.title) ? self.contentData.metadata.title : 'True-False');
    };

    /**
     * Used for contracts.
     * Show the solution.
     *
     * @method showSolutions
     * @public
     */
    self.showSolutions = function (internal) {
      checkAnswer();
      answerGroup.showSolution();
      toggleButtonState(internal ? State.INTERNAL_SOLUTION : State.EXTERNAL_SOLUTION);
    };

    /**
     * Used for contracts.
     * Resets the complete task back to its' initial state.
     *
     * @method resetTask
     * @public
     */
    self.resetTask = function () {
      answerGroup.reset();
      self.removeFeedback();
      toggleButtonState(State.ONGOING);
    };

    /**
     * Get xAPI data.
     * Contract used by report rendering engine.
     *
     * @see contract at {@link https://h5p.org/documentation/developers/contracts#guides-header-6}
     */
    self.getXAPIData = function(){
      var xAPIEvent = this.createXAPIEventTemplate('answered');
      this.addQuestionToXAPI(xAPIEvent);
      this.addResponseToXAPI(xAPIEvent);
      return {
        statement: xAPIEvent.data.statement
      };
    };

    /**
     * Add the question itself to the definition part of an xAPIEvent
     */
    self.addQuestionToXAPI = function(xAPIEvent) {
      var definition = xAPIEvent.getVerifiedStatementValue(['object', 'definition']);
      $.extend(definition, this.getxAPIDefinition());
    };

    /**
     * Generate xAPI object definition used in xAPI statements.
     * @return {Object}
     */
    self.getxAPIDefinition = function () {
      var definition = {};
      definition.interactionType = 'true-false';
      definition.type = 'http://adlnet.gov/expapi/activities/cmi.interaction';
      definition.description = {
        'en-US': $('<div>' + params.question + '</div>').text()
      };
      definition.correctResponsesPattern = [getCorrectAnswer()];

      return definition;
    };

    /**
     * Add the response part to an xAPI event
     *
     * @param {H5P.XAPIEvent} xAPIEvent
     *  The xAPI event we will add a response to
     */
    self.addResponseToXAPI = function (xAPIEvent) {
      var isCorrect = answerGroup.isCorrect();
      var rawUserScore = isCorrect ? MAX_SCORE : 0;
      var currentResponse = '';

      xAPIEvent.setScoredResult(rawUserScore, MAX_SCORE, self, true, isCorrect);

      if(self.getCurrentState().answer !== undefined) {
        currentResponse += answerGroup.isCorrect() ? getCorrectAnswer() : getWrongAnswer();
      }
      xAPIEvent.data.statement.result.response = currentResponse;
    };
   }

  // Inheritance
  TrueFalse.prototype = Object.create(Question.prototype);
  TrueFalse.prototype.constructor = TrueFalse;

  return TrueFalse;
})(H5P.jQuery, H5P.Question);
;H5P.TrueFalse.AnswerGroup = (function ($, EventDispatcher) {
  'use strict';

  /**
   * Initialize module.
   *
   * @class H5P.TrueFalse.AnswerGroup
   * @extends H5P.EventDispatcher
   * @param {String} domId Id for label
   * @param {String} correctOption Correct option ('true' or 'false')
   * @param {Object} l10n Object containing all interface translations
   */
  function AnswerGroup(domId, correctOption, l10n) {
    var self = this;

    EventDispatcher.call(self);

    var $answers = $('<div>', {
      'class': 'h5p-true-false-answers',
      role: 'radiogroup',
      'aria-labelledby': domId
    });

    var answer;
    var trueAnswer = new H5P.TrueFalse.Answer(l10n.trueText, l10n.correctAnswerMessage, l10n.wrongAnswerMessage);
    var falseAnswer = new H5P.TrueFalse.Answer(l10n.falseText, l10n.correctAnswerMessage, l10n.wrongAnswerMessage);
    var correctAnswer = (correctOption === 'true' ? trueAnswer : falseAnswer);
    var wrongAnswer = (correctOption === 'false' ? trueAnswer : falseAnswer);

    // Handle checked
    var handleChecked = function (newAnswer, other) {
      return function () {
        answer = newAnswer;
        other.uncheck();
        self.trigger('selected');
      };
    };
    trueAnswer.on('checked', handleChecked(true, falseAnswer));
    falseAnswer.on('checked', handleChecked(false, trueAnswer));

    // Handle switches (using arrow keys)
    var handleInvert = function (newAnswer, other) {
      return function () {
        answer = newAnswer;
        other.check();
        self.trigger('selected');
      };
    };
    trueAnswer.on('invert', handleInvert(false, falseAnswer));
    falseAnswer.on('invert', handleInvert(true, trueAnswer));

    // Handle tabbing
    var handleTabable = function(other, tabable) {
      return function () {
        // If one of them are checked, that one should get tabfocus
        if (!tabable || !self.hasAnswered() || other.isChecked()) {
          other.tabable(tabable);
        }
      };
    };
    // Need to remove tabIndex on the other alternative on focus
    trueAnswer.on('focus', handleTabable(falseAnswer, false));
    falseAnswer.on('focus', handleTabable(trueAnswer, false));
    // Need to make both alternatives tabable on blur:
    trueAnswer.on('blur', handleTabable(falseAnswer, true));
    falseAnswer.on('blur', handleTabable(trueAnswer, true));

    $answers.append(trueAnswer.getDomElement());
    $answers.append(falseAnswer.getDomElement());

    /**
     * Get hold of the DOM element representing this thingy
     * @method getDomElement
     * @return {jQuery}
     */
    self.getDomElement = function () {
      return $answers;
    };

    /**
     * Programatic check
     * @method check
     * @param  {[type]} answer [description]
     */
    self.check = function (answer) {
      if (answer) {
        trueAnswer.check();
      }
      else {
        falseAnswer.check();
      }
    };

    /**
     * Return current answer
     * @method getAnswer
     * @return {Boolean} undefined if no answer if given
     */
    self.getAnswer = function () {
      return answer;
    };

    /**
     * Check if user has answered question yet
     * @method hasAnswered
     * @return {Boolean}
     */
    self.hasAnswered = function () {
      return answer !== undefined;
    };

    /**
     * Is answer correct?
     * @method isCorrect
     * @return {Boolean}
     */
    self.isCorrect = function () {
      return correctAnswer.isChecked();
    };

    /**
     * Enable user input
     *
     * @method enable
     */
    self.enable = function () {
      trueAnswer.enable().tabable(true);
      falseAnswer.enable();
    };

    /**
     * Disable user input
     *
     * @method disable
     */
    self.disable = function () {
      trueAnswer.disable();
      falseAnswer.disable();
    };

    /**
     * Reveal correct/wrong answer
     *
     * @method reveal
     */
    self.reveal = function () {
      if (self.hasAnswered()) {
        if (self.isCorrect()) {
          correctAnswer.markCorrect();
        }
        else {
          wrongAnswer.markWrong();
        }
      }

      self.disable();
    };

    /**
     * Reset task
     * @method reset
     */
    self.reset = function () {
      trueAnswer.reset();
      falseAnswer.reset();
      self.enable();
      answer = undefined;
    };

    /**
     * Show the solution
     * @method showSolution
     * @return {[type]}
     */
    self.showSolution = function () {
      correctAnswer.markCorrect();
      wrongAnswer.unmark();
    };
  }

  // Inheritance
  AnswerGroup.prototype = Object.create(EventDispatcher.prototype);
  AnswerGroup.prototype.constructor = AnswerGroup;

  return AnswerGroup;
})(H5P.jQuery, H5P.EventDispatcher);
;H5P.TrueFalse.Answer = (function ($, EventDispatcher) {
  'use strict';

  var Keys = {
    ENTER: 13,
    SPACE: 32,
    LEFT_ARROW: 37,
    UP_ARROW: 38,
    RIGHT_ARROW: 39,
    DOWN_ARROW: 40
  };

  /**
   * Initialize module.
   *
   * @class H5P.TrueFalse.Answer
   * @extends H5P.EventDispatcher
   * @param {String} text Label
   * @param {String} correctMessage Message read by readspeaker when correct alternative is chosen
   * @param {String} wrongMessage Message read by readspeaker when wrong alternative is chosen
   */
  function Answer (text, correctMessage, wrongMessage) {
    var self = this;

    EventDispatcher.call(self);

    var checked = false;
    var enabled = true;

    var $answer = $('<div>', {
      'class': 'h5p-true-false-answer',
      role: 'radio',
      'aria-checked': false,
      html: text + '<span class="aria-label"></span>',
      tabindex: 0, // Tabable by default
      click: function (event) {
        // Handle left mouse (or tap on touch devices)
        if (event.which === 1) {
          self.check();
        }
      },
      keydown: function (event) {
        if (!enabled) {
          return;
        }
        if ([Keys.SPACE, Keys.ENTER].indexOf(event.keyCode) !== -1) {
          event.preventDefault();
          self.check();
        }
        else if ([Keys.LEFT_ARROW, Keys.UP_ARROW, Keys.RIGHT_ARROW, Keys.DOWN_ARROW].indexOf(event.keyCode) !== -1) {
          event.preventDefault();
          self.uncheck();
          self.trigger('invert');
        }
      },
      focus: function () {
        self.trigger('focus');
      },
      blur: function () {
        self.trigger('blur');
      }
    });

    var $ariaLabel = $answer.find('.aria-label');

    // A bug in Chrome 54 makes the :after icons (V and X) not beeing rendered.
    // Doing this in a timeout solves this
    // Might be removed when Chrome 56 is out
    var chromeBugFixer = function (callback) {
      setTimeout(function () {
        callback();
      }, 0);
    };

    /**
     * Return the dom element representing the alternative
     *
     * @public
     * @method getDomElement
     * @return {H5P.jQuery}
     */
    self.getDomElement = function () {
      return $answer;
    };

    /**
     * Unchecks the alternative
     *
     * @public
     * @method uncheck
     * @return {H5P.TrueFalse.Answer}
     */
    self.uncheck = function () {
      if (enabled) {
        $answer.blur();
        checked = false;
        chromeBugFixer(function () {
          $answer.attr('aria-checked', checked);
        });
      }
      return self;
    };

    /**
     * Set tabable or not
     * @method tabable
     * @param  {Boolean} enabled
     * @return {H5P.TrueFalse.Answer}
     */
    self.tabable = function (enabled) {
      $answer.attr('tabIndex', enabled ? 0 : null);
      return self;
    };

    /**
     * Checks the alternative
     *
     * @method check
     * @return {H5P.TrueFalse.Answer}
     */
    self.check = function () {
      if (enabled) {
        checked = true;
        chromeBugFixer(function () {
          $answer.attr('aria-checked', checked);
        });
        self.trigger('checked');
        $answer.focus();
      }
      return self;
    };

    /**
     * Is this alternative checked?
     *
     * @method isChecked
     * @return {boolean}
     */
    self.isChecked = function () {
      return checked;
    };

    /**
     * Enable alternative
     *
     * @method enable
     * @return {H5P.TrueFalse.Answer}
     */
    self.enable = function () {
      $answer.attr({
        'aria-disabled': '',
        tabIndex: 0
      });
      enabled = true;

      return self;
    };

    /**
     * Disables alternative
     *
     * @method disable
     * @return {H5P.TrueFalse.Answer}
     */
    self.disable = function () {
      $answer.attr({
        'aria-disabled': true,
        tabIndex: null
      });
      enabled = false;

      return self;
    };

    /**
     * Reset alternative
     *
     * @method reset
     * @return {H5P.TrueFalse.Answer}
     */
    self.reset = function () {
      self.enable();
      self.uncheck();
      self.unmark();
      $ariaLabel.html('');

      return self;
    };

    /**
     * Marks this alternative as the wrong one
     *
     * @method markWrong
     * @return {H5P.TrueFalse.Answer}
     */
    self.markWrong = function () {
      chromeBugFixer(function () {
        $answer.addClass('wrong');
      });
      $ariaLabel.html('.' + wrongMessage);

      return self;
    };

    /**
     * Marks this alternative as the wrong one
     *
     * @method markCorrect
     * @return {H5P.TrueFalse.Answer}
     */
    self.markCorrect = function () {
      chromeBugFixer(function () {
        $answer.addClass('correct');
      });
      $ariaLabel.html('.' + correctMessage);

      return self;
    };

    self.unmark = function () {
      chromeBugFixer(function () {
        $answer.removeClass('wrong correct');
      });

      return self;
    };
  }

  // Inheritance
  Answer.prototype = Object.create(EventDispatcher.prototype);
  Answer.prototype.constructor = Answer;

  return Answer;

})(H5P.jQuery, H5P.EventDispatcher);
;H5P = H5P || {};

/**
 * Will render a Question with multiple choices for answers.
 *
 * Events provided:
 * - h5pQuestionSetFinished: Triggered when a question is finished. (User presses Finish-button)
 *
 * @param {Array} options
 * @param {int} contentId
 * @param {Object} contentData
 * @returns {H5P.QuestionSet} Instance
 */
H5P.QuestionSet = function (options, contentId, contentData) {
  if (!(this instanceof H5P.QuestionSet)) {
    return new H5P.QuestionSet(options, contentId, contentData);
  }
  H5P.EventDispatcher.call(this);
  var $ = H5P.jQuery;
  var self = this;
  this.contentId = contentId;

  var defaults = {
    initialQuestion: 0,
    progressType: 'dots',
    passPercentage: 50,
    questions: [],
    introPage: {
      showIntroPage: false,
      title: '',
      introduction: '',
      startButtonText: 'Start'
    },
    texts: {
      prevButton: 'Previous question',
      nextButton: 'Next question',
      finishButton: 'Finish',
      submitButton: 'Submit',
      textualProgress: 'Question: @current of @total questions',
      jumpToQuestion: 'Question %d of %total',
      questionLabel: 'Question',
      readSpeakerProgress: 'Question @current of @total',
      unansweredText: 'Unanswered',
      answeredText: 'Answered',
      currentQuestionText: 'Current question',
      navigationLabel: 'Questions',
      questionSetInstruction: 'Choose question to display'
    },
    endGame: {
      showResultPage: true,
      noResultMessage: 'Finished',
      message: 'Your result:',
      scoreBarLabel: 'You got @finals out of @totals points',
      oldFeedback: {
        successGreeting: '',
        successComment: '',
        failGreeting: '',
        failComment: ''
      },
      overallFeedback: [],
      finishButtonText: 'Finish',
      submitButtonText: 'Submit',
      solutionButtonText: 'Show solution',
      retryButtonText: 'Retry',
      showAnimations: false,
      skipButtonText: 'Skip video',
      showSolutionButton: true,
      showRetryButton: true
    },
    override: {},
    disableBackwardsNavigation: false
  };
  this.isSubmitting = contentData
         && (contentData.isScoringEnabled || contentData.isReportingEnabled);
  var params = $.extend(true, {}, defaults, options);

  var initialParams = $.extend(true, {}, defaults, options);
  var poolOrder; // Order of questions in a pool
  var currentQuestion = 0;
  var questionInstances = [];
  var questionOrder; //Stores order of questions to allow resuming of question set
  var $myDom;
  var scoreBar;
  var up;
  var renderSolutions = false;
  var showingSolutions = false;
  contentData = contentData || {};

  // Need to check with isEmpty, as {} == true
  this.hasPrevState = !H5P.isEmpty(contentData.previousState);

  // Bring question set up to date when resuming
  if (self.hasPrevState) {
    if (contentData.previousState.progress !== undefined) {
      currentQuestion = contentData.previousState.progress;
    }
    questionOrder = contentData.previousState.order;
  }

  /**
   * Randomizes questions in an array and updates an array containing their order
   * @param  {array} questions
   * @return {Object.<array, array>} questionOrdering
   */
  var randomizeQuestionOrdering = function (questions) {
    // Use a previous order if it exists
    if (self.hasPrevState && contentData.previousState.order) {
      questions = questions.slice(0, questionOrder.length);

      return {
        questions: questions,
        questionOrder: questionOrder,
      }
    }

    // Save the original order of the questions in a multidimensional array [[question0,0],[question1,1]...
    var questionOrdering = questions.map(function (questionInstance, index) {
      return [questionInstance, index];
    });

    // Shuffle the multidimensional array
    questionOrdering = H5P.shuffleArray(questionOrdering);

    // Retrieve question objects from the first index
    questions = [];
    for (var i = 0; i < questionOrdering.length; i++) {
      questions[i] = questionOrdering[i][0];
    }

    // Retrieve the new shuffled order from the second index
    var newOrder = [];
    for (var j = 0; j < questionOrdering.length; j++) {
      newOrder[j] = questionOrdering[j][1];
    }

    // Return the questions in their new order *with* their new indexes
    return {
      questions: questions,
      questionOrder: newOrder
    };
  };

  // Create a pool (a subset) of questions if necessary
  if (params.poolSize > 0) {

    // If a previous pool exists, recreate it
    if (self.hasPrevState && contentData.previousState.poolOrder) {
      poolOrder = contentData.previousState.poolOrder;

      // Recreate the pool from the saved data
      var pool = [];
      for (var i = 0; i < poolOrder.length; i++) {
        pool[i] = params.questions[poolOrder[i]];
      }

      // Replace original questions with just the ones in the pool
      params.questions = pool;
    }
    else { // Otherwise create a new pool
      // Randomize and get the results
      var poolResult = randomizeQuestionOrdering(params.questions);
      var poolQuestions = poolResult.questions;
      poolOrder = poolResult.questionOrder;

      // Discard extra questions

      poolQuestions = poolQuestions.slice(0, params.poolSize);
      poolOrder = poolOrder.slice(0, params.poolSize);

      // Replace original questions with just the ones in the pool
      params.questions = poolQuestions;
    }
  }

  // Set overrides for questions
  var override;
  if (params.override.showSolutionButton || params.override.retryButton || params.override.checkButton === false) {
    override = {};
    if (params.override.showSolutionButton) {
      // Force "Show solution" button to be on or off for all interactions
      override.enableSolutionsButton =
          (params.override.showSolutionButton === 'on' ? true : false);
    }

    if (params.override.retryButton) {
      // Force "Retry" button to be on or off for all interactions
      override.enableRetry =
          (params.override.retryButton === 'on' ? true : false);
    }

    if (params.override.checkButton === false) {
      // Force "Check" button to be on or off for all interactions
      override.enableCheckButton = params.override.checkButton;
    }
  }

  /**
   * Generates question instances from H5P objects
   *
   * @param  {object} questions H5P content types to be created as instances
   * @return {array} Array of questions instances
   */
  var createQuestionInstancesFromQuestions = function (questions) {
    var result = [];
    // Create question instances from questions
    // Instantiate question instances
    for (var i = 0; i < questions.length; i++) {

      var question;
      // If a previous order exists, use it
      if (questionOrder !== undefined) {
        question = questions[questionOrder[i]];
      }
      else {
        // Use a generic order when initialzing for the first time
        question = questions[i];
      }

      if (!question.library) {
        continue;
      }

      if (override) {
        // Extend subcontent with the overrided settings.
        $.extend(question.params.behaviour, override);
      }

      question.params = question.params || {};
      var hasAnswers = self.hasPrevState && contentData.previousState.answers;
      var questionInstance = H5P.newRunnable(question, contentId, undefined, undefined,
        {
          previousState: hasAnswers ? contentData.previousState.answers[i] : undefined,
          parent: self
        });
      questionInstance.on('resize', function () {
        up = true;
        self.trigger('resize');
      });
      result.push(questionInstance);
    }

    return result;
  };

  // Create question instances from questions given by params
  questionInstances = createQuestionInstancesFromQuestions(params.questions);
  params.noOfQuestionAnswered = 0;
  if (self.hasPrevState) {
    // get numbers of questions answered by user
    if (contentData.previousState.answers) {
      for (var i = 0; i < questionInstances.length; i++) {
        let answered = questionInstances[i].getAnswerGiven();
        if (answered){
          params.noOfQuestionAnswered++;
        }
      }
    }
  }

  // Create html for intro page layout
  self.$introPage = '';
  if (params.introPage.showIntroPage && params.noOfQuestionAnswered === 0) {
    self.$introPage = $('<div>', {
      class: 'intro-page'
    });
  
    if (params.introPage.title) {
      $('<div>', {
        class: 'title',
        html: '<h1>' + 
              params.introPage.title + 
              '</h1>',
        appendTo: self.$introPage
      });
    }

    if (params.introPage.introduction) {
      $('<div>', {
        class: 'introduction',
        html: params.introPage.introduction,
        appendTo: self.$introPage
      });
    }

    self.$introButtonsContainer = $('<div>', {
      class: 'buttons',
      appendTo: self.$introPage
    });
  
    $('<button>', {
      class: 'qs-startbutton h5p-joubelui-button h5p-button',
      html: params.introPage.startButtonText,
      appendTo: self.$introButtonsContainer
    });
  }

  // Create html for progress announcer
  self.$progressAnnouncer = $('<div>', {
    class: 'qs-progress-announcer',
    'aria-live': 'polite',
  });

  // Create html for questionset
  self.$questionsContainer = $('<div>', {
    class: 'questionset ' + 
    ((params.introPage.showIntroPage && params.noOfQuestionAnswered === 0) ? 'hidden' : ''),
  });

  const tabIDs = Array.from({length: params.questions.length}, () => H5P.createUUID());
  const tabPanelIDs = Array.from({length: params.questions.length}, () => H5P.createUUID());

  for (let i=0; i<params.questions.length; i++) {
    $('<div>', {
      class: 'question-container',
      role: 'tabpanel',
      id: tabPanelIDs[i],
      'aria-labelledby': tabIDs[i],
      appendTo: self.$questionsContainer
    });
  }

  self.$footer = $('<div>', {
    class: 'qs-footer',
    appendTo: self.$questionsContainer
  });

  self.$progressBar = $('<div>', {
    class: 'qs-progress',
    role: 'navigation',
    'aria-label': params.texts.navigationLabel,
    appendTo: self.$footer
  });

  if (params.progressType == "dots") {
    self.$dotsContainer = $('<ul>', {
      class: 'dots-container',
      role: 'tablist',
      'aria-label': params.texts.questionSetInstruction,
      appendTo: self.$progressBar
    });

    for (let i=0; i<params.questions.length; i++) {
      $('<li>', {
        class: 'progress-item',
        html: '<a href="#" class= "progress-dot unanswered ' + 
              (params.disableBackwardsNavigation ? 'disabled' : '') +
              '" ' +
              'id="' +
              tabIDs[i] +
              '" ' +
              'aria-label=' +
                '"' +
                params.texts.jumpToQuestion.replace("%d", i + 1).replace("%total", params.questions.length) +
                ', ' +
                params.texts.unansweredText +
                '" ' +
              'tabindex="-1" ' +
              (params.disableBackwardsNavigation ? 'aria-disabled="true"' : '') +
              ' aria-controls="' +
              tabPanelIDs[i] +
              '" ' +
              'aria-selected="false" ' +
              'role="tab"></a>',
        appendTo: self.$dotsContainer
      })
    }
  }

  else if (params.progressType == "textual") {
    $('<span>', {
      class: 'progress-text',
      appendTo: self.$progressBar
    })
}

  // Randomize questions only on instantiation
  if (params.randomQuestions && !self.hasPrevState) {
    var result = randomizeQuestionOrdering(questionInstances);
    questionInstances = result.questions;
    questionOrder = result.questionOrder;
  }

  // Resize all interactions on resize
  self.on('resize', function () {
    if (up) {
      // Prevent resizing the question again.
      up = false;
      return;
    }

    for (var i = 0; i < questionInstances.length; i++) {
      questionInstances[i].trigger('resize');
    }
  });

  // Update button state.
  var _updateButtons = function () {
    // Verify that current question is answered when backward nav is disabled
    if (params.disableBackwardsNavigation) {
      if (questionInstances[currentQuestion].getAnswerGiven() &&
          questionInstances.length-1 !== currentQuestion) {
        questionInstances[currentQuestion].showButton('next');
      }
      else {
        questionInstances[currentQuestion].hideButton('next');
      }
    }

    var answered = true;
    for (var i = questionInstances.length - 1; i >= 0; i--) {
      answered = answered && (questionInstances[i]).getAnswerGiven();
    }

    if (currentQuestion === (params.questions.length - 1) &&
        questionInstances[currentQuestion]) {
      if (answered) {
        questionInstances[currentQuestion].showButton('finish');
      }
      else {
        questionInstances[currentQuestion].hideButton('finish');
      }
    }
  };

  var _showQuestion = function (questionNumber, preventAnnouncement) {
    // Sanitize input.
    if (questionNumber < 0) {
      questionNumber = 0;
    }
    if (questionNumber >= params.questions.length) {
      questionNumber = params.questions.length - 1;
    }

    currentQuestion = questionNumber;

    // Hide all questions
    $('.question-container', $myDom).hide().eq(questionNumber).show();

    if (questionInstances[questionNumber]) {
      // Trigger resize on question in case the size of the QS has changed.
      var instance = questionInstances[questionNumber];
      instance.setActivityStarted();
      if (instance.$ !== undefined) {
        instance.trigger('resize');
      }
    }

    // Update progress indicator
    // Test if current has been answered.
    if (params.progressType === 'textual') {
      $('.progress-text', $myDom).text(params.texts.textualProgress.replace("@current", questionNumber+1).replace("@total", params.questions.length));
    }
    else {
      // Set currentNess
      var previousQuestion = $('.progress-dot.current', $myDom).parent().index();
      if (previousQuestion >= 0) {
        toggleCurrentDot(previousQuestion, false);
        toggleAnsweredDot(previousQuestion, questionInstances[previousQuestion].getAnswerGiven());
      }
      toggleCurrentDot(questionNumber, true);
    }

    if (!preventAnnouncement) {
      // Announce question number of total, must use timeout because of buttons logic
      setTimeout(function () {
        var humanizedProgress = params.texts.readSpeakerProgress
          .replace('@current', (currentQuestion + 1).toString())
          .replace('@total', questionInstances.length.toString());

        self.$progressAnnouncer.html(humanizedProgress);

        if (instance && instance.readFeedback) {
          instance.readFeedback();
        }
      }, 0);
    }

    // Remember where we are
    _updateButtons();
    self.trigger('resize');
    return currentQuestion;
  };

  /**
   * Show solutions for subcontent, and hide subcontent buttons.
   * Used for contracts with integrated content.
   * @public
   */
  var showSolutions = function () {
    showingSolutions = true;
    for (var i = 0; i < questionInstances.length; i++) {

      // Enable back and forth navigation in solution mode
      toggleDotsNavigation(true);
      if (i < questionInstances.length - 1) {
        questionInstances[i].showButton('next');
      }
      if (i > 0) {
        questionInstances[i].showButton('prev');
      }

      try {
        // Do not read answers
        questionInstances[i].toggleReadSpeaker(true);
        questionInstances[i].showSolutions();
        questionInstances[i].toggleReadSpeaker(false);
      }
      catch (error) {
        H5P.error("subcontent does not contain a valid showSolutions function");
        H5P.error(error);
      }
    }
  };

  /**
   * Toggles whether dots are enabled for navigation
   */
  var toggleDotsNavigation = function (enable) {
    $('.progress-dot', $myDom).each(function () {
      $(this).toggleClass('disabled', !enable);
      $(this).attr('aria-disabled', enable ? 'false' : 'true');
      // Remove tabindex
      if (!enable) {
        $(this).attr('tabindex', '-1');
      }
    });
  };

  /**
   * Resets the task and every subcontent task.
   * Used for contracts with integrated content.
   * @public
   * @param {boolean} moveFocus True to move the focus to first option
   * This prevents loss of focus if reset from within content
   */
  this.resetTask = function (moveFocus = false) {

    // Clear previous state to ensure questions are created cleanly
    contentData.previousState = {};
    self.hasPrevState = false;
    questionOrder = undefined;

    showingSolutions = false;

    for (var i = 0; i < questionInstances.length; i++) {
      try {
        questionInstances[i].resetTask();

        // Hide back and forth navigation in normal mode
        if (params.disableBackwardsNavigation) {
          toggleDotsNavigation(false);

          // Check if first question is answered by default
          if (i === 0 && questionInstances[i].getAnswerGiven()) {
            questionInstances[i].showButton('next');
          }
          else {
            questionInstances[i].hideButton('next');
          }

          questionInstances[i].hideButton('prev');
        }
      }
      catch (error) {
        H5P.error("subcontent does not contain a valid resetTask function");
        H5P.error(error);
      }
    }

    // Hide finish button
    questionInstances[questionInstances.length - 1].hideButton('finish');

    // Mark all tasks as unanswered:
    $('.progress-dot').each(function (idx) {
      toggleAnsweredDot(idx, false);
    });

    //Force the last page to be reRendered
    rendered = false;

    if (params.poolSize > 0) {

      // Make new pool from params.questions
      // Randomize and get the results
      var poolResult = randomizeQuestionOrdering(initialParams.questions);
      var poolQuestions = poolResult.questions;
      poolOrder = poolResult.questionOrder;

      // Discard extra questions
      poolQuestions = poolQuestions.slice(0, params.poolSize);
      poolOrder = poolOrder.slice(0, params.poolSize);

      // Replace original questions with just the ones in the pool
      params.questions = poolQuestions;

      // Recreate the question instances
      questionInstances = createQuestionInstancesFromQuestions(params.questions);

      // Update buttons
      initializeQuestion();

    }
    else if (params.randomQuestions) {
      randomizeQuestions();
    }

    // Reset currentQuestion
    currentQuestion = 0;

    $myDom?.children().hide();
    var $intro = $('.intro-page', $myDom);

    if ($intro.length) {
      // Show intro
      $('.intro-page', $myDom).show();
      if (moveFocus) {
        $('.qs-startbutton', $myDom).focus();
      }
    }
    else {
      // Show first question
      $('.questionset', $myDom).show();
      _showQuestion(params.initialQuestion);

      if (moveFocus) {
        // Focus first tabbable element
        $myDom[0].querySelectorAll(
          'audio, button, input, select, textarea, video, [contenteditable], [href], [tabindex="0"]'
        )[0].focus();
      }
    }
  };

  var rendered = false;

  this.reRender = function () {
    rendered = false;
  };

  /**
   * Randomizes question instances
   */
  var randomizeQuestions = function () {
    // Recreate questioninstances in original order
    questionInstances = createQuestionInstancesFromQuestions(params.questions);

    // Scramble them
    var result = randomizeQuestionOrdering(questionInstances);
    questionInstances = result.questions;
    questionOrder = result.questionOrder;

    // Update buttons
    initializeQuestion();
  };

  var moveQuestion = function (direction) {
    if (params.disableBackwardsNavigation && !questionInstances[currentQuestion].getAnswerGiven()) {
      questionInstances[currentQuestion].hideButton('next');
      questionInstances[currentQuestion].hideButton('finish');
      return;
    }

    if (currentQuestion + direction >= questionInstances.length) {
      toggleCurrentDot(currentQuestion, false);
      toggleAnsweredDot(currentQuestion, questionInstances[currentQuestion].getAnswerGiven());
      _displayEndGame();
    }
    else {
      // Allow movement if backward navigation enabled or answer given
      _showQuestion(currentQuestion + direction);
    }

    // Trigger xAPI
    self.triggerXAPIProgressed();
  };

  /**
   * Toggle answered state of dot at given index
   * @param {number} dotIndex Index of dot
   * @param {boolean} isAnswered True if is answered, False if not answered
   */
  var toggleAnsweredDot = function (dotIndex, isAnswered) {
    var $el = $('.progress-dot:eq(' + dotIndex +')', $myDom);

    // Skip current button
    if ($el.hasClass('current')) {
      return;
    }

    // Ensure boolean
    isAnswered = !!isAnswered;

    var label = params.texts.jumpToQuestion
      .replace('%d', (dotIndex + 1).toString())
      .replace('%total', $('.progress-dot', $myDom).length) +
      ', ' +
      (isAnswered ? params.texts.answeredText : params.texts.unansweredText);

    $el.toggleClass('unanswered', !isAnswered)
      .toggleClass('answered', isAnswered)
      .attr('aria-label', label);
  };

  /**
   * Toggle current state of dot at given index
   * @param dotIndex
   * @param isCurrent
   */
  var toggleCurrentDot = function (dotIndex, isCurrent) {
    var $el = $('.progress-dot:eq(' + dotIndex +')', $myDom);
    var texts = params.texts;
    var label = texts.jumpToQuestion
      .replace('%d', (dotIndex + 1).toString())
      .replace('%total', $('.progress-dot', $myDom).length);

    if (!isCurrent) {
      var isAnswered = $el.hasClass('answered');
      label += ', ' + (isAnswered ? texts.answeredText : texts.unansweredText);
    }
    else {
      label += ', ' + texts.currentQuestionText;
    }

    var disabledTabindex = params.disableBackwardsNavigation && !showingSolutions;
    $el.toggleClass('current', isCurrent)
      .attr('aria-label', label)
      .attr('tabindex', isCurrent && !disabledTabindex ? 0 : -1)
      .attr('aria-selected', isCurrent && !disabledTabindex);
  };

  var _displayEndGame = function () {
    $('.progress-dot.current', $myDom).removeClass('current');
    if (rendered) {
      $myDom.children().hide().filter('.questionset-results').show();
      self.trigger('resize');
      return;
    }
    //Remove old score screen.
    $myDom.children().hide().filter('.questionset-results').remove();
    rendered = true;

    // Get total score.
    var finals = self.getScore();
    var totals = self.getMaxScore();

    var scoreString = H5P.Question.determineOverallFeedback(params.endGame.overallFeedback, finals / totals).replace('@score', finals).replace('@total', totals);
    var success = ((100 * finals / totals) >= params.passPercentage);

    /**
     * Makes our buttons behave like other buttons.
     *
     * @private
     * @param {string} classSelector
     * @param {function} handler
     */
    var hookUpButton = function (classSelector, handler) {
      $(classSelector, $myDom).click(handler).keypress(function (e) {
        if (e.which === 32) {
          handler();
          e.preventDefault();
        }
      });
    };

    var displayResults = function () {
      self.triggerXAPICompleted(self.getScore(), self.getMaxScore(), success);

      var eparams = {
        message: params.endGame.showResultPage ? params.endGame.message : params.endGame.noResultMessage,
        comment: params.endGame.showResultPage ? (success ? params.endGame.oldFeedback.successGreeting : params.endGame.oldFeedback.failGreeting) : undefined,
        resulttext: params.endGame.showResultPage ? (success ? params.endGame.oldFeedback.successComment : params.endGame.oldFeedback.failComment) : undefined,
        finishButtonText: (self.isSubmitting) ? params.endGame.submitButtonText : params.endGame.finishButtonText,
        solutionButtonText: params.endGame.solutionButtonText,
        retryButtonText: params.endGame.retryButtonText
      };

      // Create html for end screen
      self.$resultPage = $('<div>', {
        'class': 'questionset-results'
      });
    
      $('<div>', {
        class: 'greeting',
        html: eparams.message,
        appendTo: self.$resultPage
      });
    
      $('<div>', {
        class: 'feedback-section',
        html: '<div class="feedback-scorebar"></div>' +
              '<div class="feedback-text"></div>',
        appendTo: self.$resultPage
      });
    
      if (params.comment) {
        $('<div>', {
          'class': 'result-header',
          html: eparams.comment,
          appendTo: self.$resultPage
        });
      }
    
      if (params.resulttext) {
        $('<div>', {
          class: 'result-text',
          html: eparams.resulttext,
          appendTo: self.$resultPage
        });
      }
      
      self.$buttonsContainer = $('<div>', {
        class: 'buttons',
        appendTo: self.$resultPage
      });

      if (params.endGame.showSolutionButton) {
        $('<button>', {
          class: 'h5p-joubelui-button h5p-button qs-solutionbutton',
          type: 'button',
          html: eparams.solutionButtonText,
          appendTo: self.$buttonsContainer
        });
      }

      if (params.endGame.showRetryButton) {
        $('<button>', {
          class: 'h5p-joubelui-button h5p-button qs-retrybutton',
          type: 'button',
          html: eparams.retryButtonText,
          appendTo: self.$buttonsContainer
        })
      }

      // Show result page.
      $myDom.children().hide();
      $myDom.append(self.$resultPage);

      if (params.endGame.showResultPage) {
        hookUpButton('.qs-solutionbutton', function () {
          showSolutions();
          $myDom.children().hide().filter('.questionset').show();
          _showQuestion(params.initialQuestion);
        });
        hookUpButton('.qs-retrybutton', function () {
          self.resetTask(true);
        });

        if (scoreBar === undefined) {
          scoreBar = H5P.JoubelUI.createScoreBar(totals);
        }
        scoreBar.appendTo($('.feedback-scorebar', $myDom));
        $('.feedback-text', $myDom).html(scoreString);

        // Announce that the question set is complete
        setTimeout(function () {
          self.$progressAnnouncer
            .html(eparams.message + 
                  scoreString + '.' +
                  (params.endGame.scoreBarLabel).replace('@finals', finals).replace('@totals', totals) + '.' +
                  eparams.comment + '.' +
                  eparams.resulttext);

          scoreBar.setMaxScore(totals);
          scoreBar.setScore(finals);
        }, 0);
      }
      else {
        // Remove buttons and feedback section
        $('.qs-solutionbutton, .qs-retrybutton, .feedback-section', $myDom).remove();
      }

      self.trigger('resize');
    };

    if (params.endGame.showAnimations) {
      var videoData = success ? params.endGame.successVideo : params.endGame.failVideo;
      if (videoData) {
        $myDom.children().hide();
        var $videoContainer = $('<div class="video-container"></div>').appendTo($myDom);

        var video = new H5P.Video({
          sources: videoData,
          fitToWrapper: true,
          controls: false,
          autoplay: false
        }, contentId);
        video.on('stateChange', function (event) {
          if (event.data === H5P.Video.ENDED) {
            displayResults();
            $videoContainer.hide();
          }
        });
        video.attach($videoContainer);
        // Resize on video loaded
        video.on('loaded', function () {
          self.trigger('resize');
        });
        video.play();

        if (params.endGame.skippable) {
          $('<a class="h5p-joubelui-button h5p-button skip">' + params.endGame.skipButtonText + '</a>').click(function () {
            video.pause();
            $videoContainer.hide();
            displayResults();
          }).appendTo($videoContainer);
        }

        return;
      }
    }
    // Trigger finished event.
    displayResults();
    self.trigger('resize');
  };

  var registerImageLoadedListener = function (question) {
    H5P.on(question, 'imageLoaded', function () {
      self.trigger('resize');
    });
  };

  /**
   * Initialize a question and attach it to the DOM
   *
   */
  function initializeQuestion() {
    // Attach questions
    for (var i = 0; i < questionInstances.length; i++) {
      var question = questionInstances[i];

      // Make sure styles are not being added twice
      $('.question-container:eq(' + i + ')', $myDom).attr('class', 'question-container');

      question.attach($('.question-container:eq(' + i + ')', $myDom));

      // Listen for image resize
      registerImageLoadedListener(question);

      // Add finish button
      const finishButtonText = (self.isSubmitting) ? params.texts.submitButton : params.texts.finishButton
      question.addButton('finish', finishButtonText,
        moveQuestion.bind(this, 1), false);

      // Add next button
      question.addButton('next', '', moveQuestion.bind(this, 1),
        !params.disableBackwardsNavigation || !!question.getAnswerGiven(), {
          href: '#', // Use href since this is a navigation button
          'aria-label': params.texts.nextButton
        });

      // Add previous button
      question.addButton('prev', '', moveQuestion.bind(this, -1),
        !(questionInstances[0] === question || params.disableBackwardsNavigation), {
          href: '#', // Use href since this is a navigation buttonq
          'aria-label': params.texts.prevButton
        });

      // Hide next button if it is the last question
      if (questionInstances[questionInstances.length -1] === question) {
        question.hideButton('next');
      }

      question.on('xAPI', function (event) {
        var shortVerb = event.getVerb();
        if (shortVerb === 'interacted' ||
          shortVerb === 'answered' ||
          shortVerb === 'attempted') {
          toggleAnsweredDot(currentQuestion,
            questionInstances[currentQuestion].getAnswerGiven());
          _updateButtons();
        }
        if (shortVerb === 'completed') {
          // An activity within this activity is not allowed to send completed events
          event.setVerb('answered');
        }
        if (event.data.statement.context.extensions === undefined) {
          event.data.statement.context.extensions = {};
        }
        event.data.statement.context.extensions['http://id.tincanapi.com/extension/ending-point'] = currentQuestion + 1;
      });

      // Mark question if answered
      toggleAnsweredDot(i, question.getAnswerGiven());
    }
  }

  this.attach = function (target) {
    if (this.isRoot()) {
      this.setActivityStarted();
    }
    if (typeof(target) === "string") {
      $myDom = $('#' + target);
    }
    else {
      $myDom = $(target);
    }

    // Render own DOM into target.
    $myDom.children().remove();
    $myDom.append(self.$introPage, self.$questionsContainer);
    $myDom.parent().append(self.$progressAnnouncer);

    if (params.backgroundImage !== undefined) {
      $myDom.css({
        overflow: 'hidden',
        background: '#fff url("' + H5P.getPath(params.backgroundImage.path, contentId) + '") no-repeat 50% 50%',
        backgroundSize: '100% auto'
      });
    }

    if (params.introPage.backgroundImage !== undefined) {
      var $intro = $myDom.find('.intro-page');
      if ($intro.length) {
        var bgImg = params.introPage.backgroundImage;
        var bgImgRatio = (bgImg.height / bgImg.width);
        $intro.css({
          background: '#fff url("' + H5P.getPath(bgImg.path, contentId) + '") no-repeat 50% 50%',
          backgroundSize: 'auto 100%',
          minHeight: bgImgRatio * +window.getComputedStyle($intro[0]).width.replace('px','')
        });
      }
    }

    initializeQuestion();

    // Allow other libraries to add transitions after the questions have been inited
    $('.questionset', $myDom).addClass('started');

    $('.qs-startbutton', $myDom)
      .click(function () {
        $(this).parents('.intro-page').hide();
        $('.questionset', $myDom).show();
        _showQuestion(params.initialQuestion);
        event.preventDefault();
      })
      .keydown(function (event) {
        switch (event.which) {
          case 13: // Enter
          case 32: // Space
            $(this).parents('.intro-page').hide();
            $('.questionset', $myDom).show();
            _showQuestion(params.initialQuestion);
            event.preventDefault();
        }
      });

    /**
     * Triggers changing the current question.
     *
     * @private
     * @param {Object} [event]
     */
    var handleProgressDotClick = function (event) {
      // Disable dots when backward nav disabled
      event.preventDefault();
      if (params.disableBackwardsNavigation && !showingSolutions) {
        return;
      }
      _showQuestion($(this).parent().index());

      // Trigger xAPI
      self.triggerXAPIProgressed();
    };

    // Set event listeners.
    $('.progress-dot', $myDom).click(handleProgressDotClick).keydown(function (event) {
      var $this = $(this);
      switch (event.which) {
        case 13: // Enter
        case 32: // Space
          handleProgressDotClick.call(this, event);
          break;

        case 37: // Left Arrow
        case 38: // Up Arrow
          // Go to previous dot
          var $prev = $this.parent().prev();
          if ($prev.length) {
            $prev.children('a').attr('tabindex', '0').focus();
            $this.attr('tabindex', '-1');
          }
          break;

        case 39: // Right Arrow
        case 40: // Down Arrow
          // Go to next dot
          var $next = $this.parent().next();
          if ($next.length) {
            $next.children('a').attr('tabindex', '0').focus();
            $this.attr('tabindex', '-1');
          }
          break;
      }
    });



    // Hide all but current question
    _showQuestion(currentQuestion, true);

    if (renderSolutions) {
      showSolutions();
    }
    // Update buttons in case they have changed (restored user state)
    _updateButtons();

    this.trigger('resize');

    return this;
  };

  // Get current score for questionset.
  this.getScore = function () {
    var score = 0;
    for (var i = questionInstances.length - 1; i >= 0; i--) {
      score += questionInstances[i].getScore();
    }
    return score;
  };

  // Get total score possible for questionset.
  this.getMaxScore = function () {
    var score = 0;
    for (var i = questionInstances.length - 1; i >= 0; i--) {
      score += questionInstances[i].getMaxScore();
    }
    return score;
  };

  /**
   * @deprecated since version 1.9.2
   * @returns {number}
   */
  this.totalScore = function () {
    return this.getMaxScore();
  };

  /**
   * Gather copyright information for the current content.
   *
   * @returns {H5P.ContentCopyrights}
   */
  this.getCopyrights = function () {
    var info = new H5P.ContentCopyrights();

    // IntroPage Background
    if (params.introPage !== undefined && params.introPage.backgroundImage !== undefined && params.introPage.backgroundImage.copyright !== undefined) {
      var introBackground = new H5P.MediaCopyright(params.introPage.backgroundImage.copyright);
      introBackground.setThumbnail(new H5P.Thumbnail(H5P.getPath(params.introPage.backgroundImage.path, contentId), params.introPage.backgroundImage.width, params.introPage.backgroundImage.height));
      info.addMedia(introBackground);
    }

    // Background
    if (params.backgroundImage !== undefined && params.backgroundImage.copyright !== undefined) {
      var background = new H5P.MediaCopyright(params.backgroundImage.copyright);
      background.setThumbnail(new H5P.Thumbnail(H5P.getPath(params.backgroundImage.path, contentId), params.backgroundImage.width, params.backgroundImage.height));
      info.addMedia(background);
    }

    // Questions
    var questionCopyrights;
    for (var i = 0; i < questionInstances.length; i++) {
      var instance = questionInstances[i];
      var instanceParams = params.questions[i].params;

      questionCopyrights = undefined;

      if (instance.getCopyrights !== undefined) {
        // Use the instance's own copyright generator
        questionCopyrights = instance.getCopyrights();
      }
      if (questionCopyrights === undefined) {
        // Create a generic flat copyright list
        questionCopyrights = new H5P.ContentCopyrights();
        H5P.findCopyrights(questionCopyrights, instanceParams.params, contentId,{
          metadata: instanceParams.metadata,
          machineName: instanceParams.library.split(' ')[0]
        });
      }

      // Determine label
      var label = (params.texts.questionLabel + ' ' + (i + 1));
      if (instanceParams.params.contentName !== undefined) {
        label += ': ' + instanceParams.params.contentName;
      }
      else if (instance.getTitle !== undefined) {
        label += ': ' + instance.getTitle();
      }
      questionCopyrights.setLabel(label);

      // Add info
      info.addContent(questionCopyrights);
    }

    // Success video
    var video;
    if (params.endGame.successVideo !== undefined && params.endGame.successVideo.length > 0) {
      video = params.endGame.successVideo[0];
      if (video.copyright !== undefined) {
        info.addMedia(new H5P.MediaCopyright(video.copyright));
      }
    }

    // Fail video
    if (params.endGame.failVideo !== undefined && params.endGame.failVideo.length > 0) {
      video = params.endGame.failVideo[0];
      if (video.copyright !== undefined) {
        info.addMedia(new H5P.MediaCopyright(video.copyright));
      }
    }

    return info;
  };
  this.getQuestions = function () {
    return questionInstances;
  };
  this.showSolutions = function () {
    renderSolutions = true;
  };

  /**
   * Returns the complete state of question set and sub-content
   *
   * @returns {Object} current state
   */
  this.getCurrentState = function () {
    const progress = showingSolutions ? questionInstances.length - 1 : currentQuestion;
    const answers = questionInstances.map(function (qi) {
      return qi.getCurrentState();
    });

    // If the user has moved past the first question, if the content has been resumed,
    // or if at least one of the answers to the questions are considered not empty.
    if (progress || self.hasPrevState || answers.some(answer => !H5P.isEmpty(answer))) {
      return {
        progress: progress,
        answers: answers,
        order: questionOrder,
        poolOrder: poolOrder,
      };
    }

    return {};
  };

  /**
   * Trigger the xAPI progressed event
   */
  this.triggerXAPIProgressed = function () {
    const progressedEvent = this.createXAPIEventTemplate('progressed');
    if (progressedEvent.data.statement.context.extensions === undefined) {
      progressedEvent.data.statement.context.extensions = {};
    }
    
    progressedEvent.data.statement.context.extensions['http://id.tincanapi.com/extension/ending-point'] = currentQuestion + 1;
    this.trigger(progressedEvent);
  }

  /**
   * Generate xAPI object definition used in xAPI statements.
   * @return {Object}
   */
  var getxAPIDefinition = function () {
    var definition = {};

    definition.interactionType = 'compound';
    definition.type = 'http://adlnet.gov/expapi/activities/cmi.interaction';
    definition.description = {
      'en-US': ''
    };

    return definition;
  };

  /**
   * Add the question itself to the definition part of an xAPIEvent
   */
  var addQuestionToXAPI = function (xAPIEvent) {
    var definition = xAPIEvent.getVerifiedStatementValue(['object', 'definition']);
    $.extend(definition, getxAPIDefinition());
  };

  /**
   * Get xAPI data from sub content types
   *
   * @param {Object} metaContentType
   * @returns {array}
   */
  var getXAPIDataFromChildren = function (metaContentType) {
    return metaContentType.getQuestions().map(function (question) {
      return question.getXAPIData();
    });
  };

  /**
   * Get xAPI data.
   * Contract used by report rendering engine.
   *
   * @see contract at {@link https://h5p.org/documentation/developers/contracts#guides-header-6}
   */
  this.getXAPIData = function () {
    var xAPIEvent = this.createXAPIEventTemplate('answered');
    addQuestionToXAPI(xAPIEvent);
    xAPIEvent.setScoredResult(this.getScore(),
      this.getMaxScore(),
      this,
      true,
      this.getScore() === this.getMaxScore()
    );
    return {
      statement: xAPIEvent.data.statement,
      children: getXAPIDataFromChildren(this)
    };
  };

  /**
   * Get context data.
   * Contract used for confusion report.
   */
  this.getContext = function () {
    // Get question index and add 1, count starts from 0
    let contextObject = {
      type: 'question',
      value: (currentQuestion + 1)
    };

    // Send actual index of the question if questions are randomized
    if (params.randomQuestions) {
      contextObject.actual = questionOrder[currentQuestion] + 1;
    }
    return contextObject;
  };
};

H5P.QuestionSet.prototype = Object.create(H5P.EventDispatcher.prototype);
H5P.QuestionSet.prototype.constructor = H5P.QuestionSet;
;/**
 * @class
 * @classdesc Keyboard navigation for accessibility support
 * @extends H5P.EventDispatcher
 */
H5P.KeyboardNav = (function (EventDispatcher) {
  /**
   * Construct a new KeyboardNav
   * @constructor
   */
  function KeyboardNav() {
    EventDispatcher.call(this);

    /** @member {boolean} */
    this.selectability = true;

    /** @member {HTMLElement[]|EventTarget[]} */
    this.elements = [];
  }

  KeyboardNav.prototype = Object.create(EventDispatcher.prototype);
  KeyboardNav.prototype.constructor = KeyboardNav;

  /**
   * Adds a new element to navigation
   *
   * @param {HTMLElement} el The element
   * @public
   */
  KeyboardNav.prototype.addElement = function(el){
    const keyDown = this.handleKeyDown.bind(this);
    const onClick = this.onClick.bind(this);
    el.addEventListener('keydown', keyDown);
    el.addEventListener('click', onClick);

    // add to array to navigate over
    this.elements.push({
      el: el,
      keyDown: keyDown,
      onClick: onClick,
    });

    if(this.elements.length === 1){ // if first
      this.setTabbableAt(0);
    }
  };

  /**
   * Select the previous element in the list. Select the last element,
   * if the current element is the first element in the list.
   *
   * @param {Number} index The index of currently selected element
   * @public
   * @fires KeyboardNav#previousOption
   */
  KeyboardNav.prototype.previousOption = function (index) {
    var isFirstElement = index === 0;
    if (isFirstElement) {
      return;
    }

    this.focusOnElementAt(isFirstElement ? (this.elements.length - 1) : (index - 1));

    /**
     * Previous option event
     *
     * @event KeyboardNav#previousOption
     * @type KeyboardNavigationEventData
     */
    this.trigger('previousOption', this.createEventPayload(index));
  };


  /**
   * Select the next element in the list. Select the first element,
   * if the current element is the first element in the list.
   *
   * @param {Number} index The index of the currently selected element
   * @public
   * @fires KeyboardNav#previousOption
   */
  KeyboardNav.prototype.nextOption = function (index) {
    var isLastElement = index === this.elements.length - 1;
    if (isLastElement) {
      return;
    }

    this.focusOnElementAt(isLastElement ? 0 : (index + 1));

    /**
     * Previous option event
     *
     * @event KeyboardNav#nextOption
     * @type KeyboardNavigationEventData
     */
    this.trigger('nextOption', this.createEventPayload(index));
  };

  /**
   * Focus on an element by index
   *
   * @param {Number} index The index of the element to focus on
   * @public
   */
  KeyboardNav.prototype.focusOnElementAt = function (index) {
    this.setTabbableAt(index);
    this.getElements()[index].focus();
  };

  /**
   * Disable possibility to select a word trough click and space or enter
   *
   * @public
   */
  KeyboardNav.prototype.disableSelectability = function () {
    this.elements.forEach(function (el) {
      el.el.removeEventListener('keydown', el.keyDown);
      el.el.removeEventListener('click', el.onClick);
    }.bind(this));
    this.selectability = false;
  };

  /**
   * Enable possibility to select a word trough click and space or enter
   *
   * @public
   */
  KeyboardNav.prototype.enableSelectability = function () {
    this.elements.forEach(function (el) {
      el.el.addEventListener('keydown', el.keyDown);
      el.el.addEventListener('click', el.onClick);
    }.bind(this));
    this.selectability = true;
  };

  /**
   * Sets tabbable on a single element in the list, by index
   * Also removes tabbable from all other elements in the list
   *
   * @param {Number} index The index of the element to set tabbale on
   * @public
   */
  KeyboardNav.prototype.setTabbableAt = function (index) {
    this.removeAllTabbable();
    this.getElements()[index].setAttribute('tabindex', '0');
  };

  /**
   * Remove tabbable from all entries
   *
   * @public
   */
  KeyboardNav.prototype.removeAllTabbable = function () {
    this.elements.forEach(function(el){
      el.el.removeAttribute('tabindex');
    });
  };

  /**
   * Toggles 'aria-selected' on an element, if selectability == true
   *
   * @param {EventTarget|HTMLElement} el The element to select/unselect
   * @private
   * @fires KeyboardNav#select
   */
  KeyboardNav.prototype.toggleSelect = function(el){
    if(this.selectability) {

      // toggle selection
      el.setAttribute('aria-selected', !isElementSelected(el));

      // focus current
      el.setAttribute('tabindex', '0');
      el.focus();

      var index = this.getElements().indexOf(el);

      /**
       * Previous option event
       *
       * @event KeyboardNav#select
       * @type KeyboardNavigationEventData
       */
      this.trigger('select', this.createEventPayload(index));
    }
  };

  /**
   * Handles key down
   *
   * @param {KeyboardEvent} event Keyboard event
   * @private
   */
  KeyboardNav.prototype.handleKeyDown = function(event){
    var index;

    switch (event.which) {
      case 13: // Enter
      case 32: // Space
        // Select
        this.toggleSelect(event.target);
        event.preventDefault();
        break;

      case 37: // Left Arrow
      case 38: // Up Arrow
        // Go to previous Option
        index = this.getElements().indexOf(event.currentTarget);
        this.previousOption(index);
        event.preventDefault();
        break;

      case 39: // Right Arrow
      case 40: // Down Arrow
        // Go to next Option
        index = this.getElements().indexOf(event.currentTarget);
        this.nextOption(index);
        event.preventDefault();
        break;
    }
  };

  /**
   * Get only elements from elements array
   * @returns {Array}
   */
  KeyboardNav.prototype.getElements = function () {
    return this.elements.map(function (el) {
      return el.el;
    });
  };

  /**
   * Handles element click. Toggles 'aria-selected' on element
   *
   * @param {MouseEvent} event Mouse click event
   * @private
   */
  KeyboardNav.prototype.onClick = function(event){
    this.toggleSelect(event.currentTarget);
  };

  /**
   * Creates a paylod for event that is fired
   *
   * @param {Number} index
   * @return {KeyboardNavigationEventData}
   */
  KeyboardNav.prototype.createEventPayload = function(index){
    /**
     * Data that is passed along as the event parameter
     *
     * @typedef {Object} KeyboardNavigationEventData
     * @property {HTMLElement} element
     * @property {number} index
     * @property {boolean} selected
     */
    return {
      element: this.getElements()[index],
      index: index,
      selected: isElementSelected(this.getElements()[index])
    };
  };

  /**
   * Sets aria-selected="true" on an element
   *
   * @param {HTMLElement} el The element to set selected
   * @return {boolean}
   */
  var isElementSelected = function(el){
    return el.getAttribute('aria-selected') === 'true';
  };

  return KeyboardNav;
})(H5P.EventDispatcher);
;H5P.MarkTheWords = H5P.MarkTheWords || {};

/**
 * Mark the words XapiGenerator
 */
H5P.MarkTheWords.XapiGenerator = (function ($) {

  /**
   * Xapi statements Generator
   * @param {H5P.MarkTheWords} markTheWords
   * @constructor
   */
  function XapiGenerator(markTheWords) {

    /**
     * Generate answered event
     * @return {H5P.XAPIEvent}
     */
    this.generateAnsweredEvent = function () {
      var xAPIEvent = markTheWords.createXAPIEventTemplate('answered');

      // Extend definition
      var objectDefinition = createDefinition(markTheWords);
      $.extend(true, xAPIEvent.getVerifiedStatementValue(['object', 'definition']), objectDefinition);

      // Set score
      xAPIEvent.setScoredResult(markTheWords.getScore(),
        markTheWords.getMaxScore(),
        markTheWords,
        true,
        markTheWords.getScore() === markTheWords.getMaxScore()
      );

      // Extend user result
      var userResult = {
        response: getUserSelections(markTheWords)
      };

      $.extend(xAPIEvent.getVerifiedStatementValue(['result']), userResult);

      return xAPIEvent;
    };
  }

  /**
   * Create object definition for question
   *
   * @param {H5P.MarkTheWords} markTheWords
   * @return {Object} Object definition
   */
  function createDefinition(markTheWords) {
    var definition = {};
    definition.description = {
      'en-US': markTheWords.params.taskDescription,
    };
    definition.type = 'http://adlnet.gov/expapi/activities/cmi.interaction';
    definition.interactionType = 'choice';
    definition.correctResponsesPattern = [getCorrectResponsesPattern(markTheWords)];
    definition.choices = getChoices(markTheWords);
    definition.extensions = {
      'https://h5p.org/x-api/line-breaks': markTheWords.getIndexesOfLineBreaks()
    };
    return definition;
  }

  /**
   * Get all choices that it is possible to choose between
   *
   * @param {H5P.MarkTheWords} markTheWords
   * @return {Array}
   */
  function getChoices(markTheWords) {
    return markTheWords.selectableWords.map(function (word, index) {
      var text = word.getText();
      if (text.charAt(0) === '*' && text.charAt(text.length - 1) === '*') {
        text = text.substr(1, text.length - 2);
      }

      return {
        id: index.toString(),
        description: {
          'en-US': $('<div>' + text + '</div>').text()
        }
      };
    });
  }

  /**
   * Get selected words as a user response pattern
   *
   * @param {H5P.MarkTheWords} markTheWords
   * @return {string}
   */
  function getUserSelections(markTheWords) {
    return markTheWords.selectableWords
      .reduce(function (prev, word, index) {
        if (word.isSelected()) {
          prev.push(index);
        }
        return prev;
      }, []).join('[,]');
  }

  /**
   * Get correct response pattern from correct words
   *
   * @param {H5P.MarkTheWords} markTheWords
   * @return {string}
   */
  function getCorrectResponsesPattern(markTheWords) {
    return markTheWords.selectableWords
      .reduce(function (prev, word, index) {
        if (word.isAnswer()) {
          prev.push(index);
        }
        return prev;
      }, []).join('[,]');
  }

  return XapiGenerator;
})(H5P.jQuery);
;H5P.MarkTheWords = H5P.MarkTheWords || {};
H5P.MarkTheWords.Word = (function () {
  /**
   * @constant
   *
   * @type {string}
  */
  Word.ID_MARK_MISSED = "h5p-description-missed";
  /**
   * @constant
   *
   * @type {string}
   */
  Word.ID_MARK_CORRECT = "h5p-description-correct";
  /**
   * @constant
   *
   * @type {string}
   */
  Word.ID_MARK_INCORRECT = "h5p-description-incorrect";

  /**
   * Class for keeping track of selectable words.
   *
   * @class
   * @param {jQuery} $word
   */
  function Word($word, params) {
    var self = this;
    self.params = params;
    H5P.EventDispatcher.call(self);

    var input = $word.text();
    var handledInput = input;

    // Check if word is an answer
    var isAnswer = checkForAnswer();

    // Remove single asterisk and escape double asterisks.
    handleAsterisks();

    if (isAnswer) {
      $word.text(handledInput);
    }

    const ariaText = document.createElement('span');
    ariaText.classList.add('hidden-but-read');
    $word[0].appendChild(ariaText);

    /**
     * Checks if the word is an answer by checking the first, second to last and last character of the word.
     *
     * @private
     * @return {Boolean} Returns true if the word is an answer.
     */
    function checkForAnswer() {
      // Check last and next to last character, in case of punctuations.
      var wordString = removeDoubleAsterisks(input);
      if (wordString.charAt(0) === ('*') && wordString.length > 2) {
        if (wordString.charAt(wordString.length - 1) === ('*')) {
          handledInput = input.slice(1, input.length - 1);
          return true;
        }
        // If punctuation, add the punctuation to the end of the word.
        else if(wordString.charAt(wordString.length - 2) === ('*')) {
          handledInput = input.slice(1, input.length - 2);
          return true;
        }
        return false;
      }
      return false;
    }

    /**
     * Removes double asterisks from string, used to handle input.
     *
     * @private
     * @param {String} wordString The string which will be handled.
     * @return {String} Returns a string without double asterisks.
     */
    function removeDoubleAsterisks(wordString) {
      var asteriskIndex = wordString.indexOf('*');
      var slicedWord = wordString;

      while (asteriskIndex !== -1) {
        if (wordString.indexOf('*', asteriskIndex + 1) === asteriskIndex + 1) {
          slicedWord = wordString.slice(0, asteriskIndex) + wordString.slice(asteriskIndex + 2, input.length);
        }
        asteriskIndex = wordString.indexOf('*', asteriskIndex + 1);
      }

      return slicedWord;
    }

    /**
     * Escape double asterisks ** = *, and remove single asterisk.
     *
     * @private
     */
    function handleAsterisks() {
      var asteriskIndex = handledInput.indexOf('*');

      while (asteriskIndex !== -1) {
        handledInput = handledInput.slice(0, asteriskIndex) + handledInput.slice(asteriskIndex + 1, handledInput.length);
        asteriskIndex = handledInput.indexOf('*', asteriskIndex + 1);
      }
    }

    /**
     * Removes any score points added to the marked word.
     */
    self.clearScorePoint = function () {
      const scorePoint = $word[0].querySelector('div');
      if (scorePoint) {
        scorePoint.parentNode.removeChild(scorePoint);
      }
    };

    /**
     * Get Word as a string
     *
     * @return {string} Word as text
     */
    this.getText = function () {
      return input;
    };

    /**
     * Clears all marks from the word.
     *
     * @public
     */
    this.markClear = function () {
      $word
        .attr('aria-selected', false)
        .removeAttr('aria-describedby');

      ariaText.innerHTML = '';
      this.clearScorePoint();
    };

    /**
     * Check if the word is correctly marked and style it accordingly.
     * Reveal result
     *
     * @public
     * @param {H5P.Question.ScorePoints} scorePoints
     */
    this.markCheck = function (scorePoints) {
      if (this.isSelected()) {
        $word.attr('aria-describedby', isAnswer ? Word.ID_MARK_CORRECT : Word.ID_MARK_INCORRECT);
        ariaText.innerHTML = isAnswer
          ? self.params.correctAnswer
          : self.params.incorrectAnswer;

        if (scorePoints) {
          $word[0].appendChild(scorePoints.getElement(isAnswer));
        }
      }
      else if (isAnswer) {
        $word.attr('aria-describedby', Word.ID_MARK_MISSED);
        ariaText.innerHTML = self.params.missedAnswer;
      }
    };

    /**
     * Checks if the word is marked correctly.
     *
     * @public
     * @returns {Boolean} True if the marking is correct.
     */
    this.isCorrect = function () {
      return (isAnswer && this.isSelected());
    };

    /**
     * Checks if the word is marked wrong.
     *
     * @public
     * @returns {Boolean} True if the marking is wrong.
     */
    this.isWrong = function () {
      return (!isAnswer && this.isSelected());
    };

    /**
     * Checks if the word is correct, but has not been marked.
     *
     * @public
     * @returns {Boolean} True if the marking is missed.
     */
    this.isMissed = function () {
      return (isAnswer && !this.isSelected());
    };

    /**
     * Checks if the word is an answer.
     *
     * @public
     * @returns {Boolean} True if the word is an answer.
     */
    this.isAnswer = function () {
      return isAnswer;
    };

    /**
     * Checks if the word is selected.
     *
     * @public
     * @returns {Boolean} True if the word is selected.
     */
    this.isSelected = function () {
      return $word.attr('aria-selected') === 'true';
    };

    /**
     * Sets that the Word is selected
     *
     * @public
     */
    this.setSelected = function () {
      $word.attr('aria-selected', 'true');
    };
  }
  Word.prototype = Object.create(H5P.EventDispatcher.prototype);
  Word.prototype.constructor = Word;

  return Word;
})();
;/*global H5P*/

/**
 * Mark The Words module
 * @external {jQuery} $ H5P.jQuery
 */
H5P.MarkTheWords = (function ($, Question, Word, KeyboardNav, XapiGenerator) {
  /**
   * Initialize module.
   *
   * @class H5P.MarkTheWords
   * @extends H5P.Question
   * @param {Object} params Behavior settings
   * @param {Number} contentId Content identification
   * @param {Object} contentData Object containing task specific content data
   *
   * @returns {Object} MarkTheWords Mark the words instance
   */
  function MarkTheWords(params, contentId, contentData) {
    this.contentId = contentId;
    this.contentData = contentData;
    this.introductionId = 'mark-the-words-introduction-' + contentId;

    Question.call(this, 'mark-the-words');

    // Set default behavior.
    this.params = $.extend(true, {
      media: {},
      taskDescription: "",
      textField: "This is a *nice*, *flexible* content type.",
      overallFeedback: [],
      behaviour: {
        enableRetry: true,
        enableSolutionsButton: true,
        enableCheckButton: true,
        showScorePoints: true
      },
      checkAnswerButton: "Check",
      submitAnswerButton: "Submit",
      tryAgainButton: "Retry",
      showSolutionButton: "Show solution",
      correctAnswer: "Correct!",
      incorrectAnswer: "Incorrect!",
      missedAnswer: "Answer not found!",
      displaySolutionDescription:  "Task is updated to contain the solution.",
      scoreBarLabel: 'You got :num out of :total points',
      a11yFullTextLabel: 'Full readable text',
      a11yClickableTextLabel: 'Full text where words can be marked',
      a11ySolutionModeHeader: 'Solution mode',
      a11yCheckingHeader: 'Checking mode',
      a11yCheck: 'Check the answers. The responses will be marked as correct, incorrect, or unanswered.',
      a11yShowSolution: 'Show the solution. The task will be marked with its correct solution.',
      a11yRetry: 'Retry the task. Reset all responses and start the task over again.',
    }, params);

    this.contentData = contentData;
    if (this.contentData !== undefined && this.contentData.previousState !== undefined) {
      this.previousState = this.contentData.previousState;
    }

    this.keyboardNavigators = [];

    this.initMarkTheWords();
    this.XapiGenerator = new XapiGenerator(this);
  }

  MarkTheWords.prototype = Object.create(H5P.EventDispatcher.prototype);
  MarkTheWords.prototype.constructor = MarkTheWords;

  /**
   * Initialize Mark The Words task
   */
  MarkTheWords.prototype.initMarkTheWords = function () {
    this.$inner = $('<div class="h5p-word-inner"></div>');

    this.addTaskTo(this.$inner);

    // Set user state
    this.setH5PUserState();
  };

  /**
   * Recursive function that creates html for the words
   * @method createHtmlForWords
   * @param  {Array}           nodes Array of dom nodes
   * @return {string}
   */
  MarkTheWords.prototype.createHtmlForWords = function (nodes) {
    var self = this;
    var html = '';
    for (var i = 0; i < nodes.length; i++) {
      var node = nodes[i];

      if (node instanceof Text) {
        var text = $(node).text();
        var selectableStrings = text.replace(/(&nbsp;|\r\n|\n|\r)/g, ' ')
          .match(/ \*[^\* ]+\* |[^\s]+/g);

        if (selectableStrings) {
          selectableStrings.forEach(function (entry) {
            entry = entry.trim();

            // Words
            if (html) {
              // Add space before
              html += ' ';
            }

            // Remove prefix punctuations from word
            var prefix = entry.match(/^[\[\({⟨¿¡“"«„]+/);
            var start = 0;
            if (prefix !== null) {
              start = prefix[0].length;
              html += prefix;
            }

            // Remove suffix punctuations from word
            var suffix = entry.match(/[",….:;?!\]\)}⟩»”]+$/);
            var end = entry.length - start;
            if (suffix !== null) {
              end -= suffix[0].length;
            }

            // Word
            entry = entry.substr(start, end);
            if (entry.length) {
              html += '<span role="option" aria-selected="false">' + self.escapeHTML(entry) + '</span>';
            }

            if (suffix !== null) {
              html += suffix;
            }
          });
        }
        else if ((selectableStrings !== null) && text.length) {
          html += '<span role="option" aria-selected="false">' + this.escapeHTML(text) + '</span>';
        }
      }
      else {
        if (node.nodeName === 'BR') {
          html += '<br/>';
        }
        else {
          var attributes = ' ';
          for (var j = 0; j < node.attributes.length; j++) {
            attributes +=node.attributes[j].name + '="' + node.attributes[j].nodeValue + '" ';
          }
          html += '<' + node.nodeName +  attributes + '>';
          html += self.createHtmlForWords(node.childNodes);
          html += '</' + node.nodeName + '>';
        }
      }
    }

    return html;
  };

  /**
   * Escapes HTML
   *
   * @param html
   * @returns {jQuery}
   */
  MarkTheWords.prototype.escapeHTML = function (html) {
    return $('<div>').text(html).html();
  };

  /**
   * Search for the last children in every paragraph and
   * return their indexes in an array
   *
   * @returns {Array}
   */
  MarkTheWords.prototype.getIndexesOfLineBreaks = function () {

    var indexes = [];
    var selectables = this.$wordContainer.find('span.h5p-word-selectable');

    selectables.each(function (index, selectable) {
      if ($(selectable).next().is('br')) {
        indexes.push(index);
      }

      if ($(selectable).parent('p') && !$(selectable).parent().is(':last-child') && $(selectable).is(':last-child')) {
        indexes.push(index);
      }
    });

    return indexes;
  };

  /**
   * Handle task and add it to container.
   * @param {jQuery} $container The object which our task will attach to.
   */
  MarkTheWords.prototype.addTaskTo = function ($container) {
    var self = this;
    self.selectableWords = [];
    self.answers = 0;

    // Wrapper
    var $wordContainer = $('<div/>', {
      'class': 'h5p-word-selectable-words',
      'aria-labelledby': self.introductionId,
      'aria-multiselectable': 'true',
      'role': 'listbox',
      html: self.createHtmlForWords($.parseHTML(self.params.textField))
    });

    let isNewParagraph = true;
    $wordContainer.find('[role="option"], br').each(function () {
      if ($(this).is('br')) {
        isNewParagraph = true;
        return;
      }

      if (isNewParagraph) {
        // Add keyboard navigation helper
        self.currentKeyboardNavigator = new KeyboardNav();

        // on word clicked
        self.currentKeyboardNavigator.on('select', function () {
          self.isAnswered = true;
          self.triggerXAPI('interacted');
        });

        self.keyboardNavigators.push(self.currentKeyboardNavigator);
        isNewParagraph = false;
      }
      self.currentKeyboardNavigator.addElement(this);

      // Add keyboard navigation to this element
      var selectableWord = new Word($(this), self.params);
      if (selectableWord.isAnswer()) {
        self.answers += 1;
      }
      self.selectableWords.push(selectableWord);
    });

    self.blankIsCorrect = (self.answers === 0);
    if (self.blankIsCorrect) {
      self.answers = 1;
    }

    // A11y full readable text
    const $ariaTextWrapper = $('<div>', {
      'class': 'hidden-but-read',
    }).appendTo($container);
    $('<div>', {
      html: self.params.a11yFullTextLabel,
    }).appendTo($ariaTextWrapper);

    // Add space after each paragraph to read the sentences better
    const ariaText = $('<div>', {
      'html': $wordContainer.html().replace('</p>', ' </p>'),
    }).text();

    $('<div>', {
      text: ariaText,
    }).appendTo($ariaTextWrapper);

    // A11y clickable list label
    this.$a11yClickableTextLabel = $('<div>', {
      'class': 'hidden-but-read',
      html: self.params.a11yClickableTextLabel,
      tabIndex: '-1',
    }).appendTo($container);

    $wordContainer.appendTo($container);
    self.$wordContainer = $wordContainer;
  };

  /**
   * Add check solution and retry buttons.
   */
  MarkTheWords.prototype.addButtons = function () {
    var self = this;
    self.$buttonContainer = $('<div/>', {
      'class': 'h5p-button-bar'
    });

    if (this.params.behaviour.enableCheckButton) {
      this.addButton('check-answer', this.params.checkAnswerButton, function () {
        self.isAnswered = true;
        var answers = self.calculateScore();
        self.feedbackSelectedWords();

        if (!self.showEvaluation(answers)) {
          // Only show if a correct answer was not found.
          if (self.params.behaviour.enableSolutionsButton && (answers.correct < self.answers)) {
            self.showButton('show-solution');
          }
          if (self.params.behaviour.enableRetry) {
            self.showButton('try-again');
          }
        }
        // Set focus to start of text
        self.$a11yClickableTextLabel.html(self.params.a11yCheckingHeader + ' - ' + self.params.a11yClickableTextLabel);
        self.$a11yClickableTextLabel.focus();

        self.hideButton('check-answer');
        self.trigger(self.XapiGenerator.generateAnsweredEvent());
        self.toggleSelectable(true);
      }, true, {
        'aria-label': this.params.a11yCheck,
      }, {
        contentData: this.contentData,
        textIfSubmitting: this.params.submitAnswerButton,
      });
    }

    this.addButton('try-again', this.params.tryAgainButton, this.resetTask.bind(this), false, {
      'aria-label': this.params.a11yRetry,
    });

    this.addButton('show-solution', this.params.showSolutionButton, function () {
      self.setAllMarks();

      self.$a11yClickableTextLabel.html(self.params.a11ySolutionModeHeader + ' - ' + self.params.a11yClickableTextLabel);
      self.$a11yClickableTextLabel.focus();

      if (self.params.behaviour.enableRetry) {
        self.showButton('try-again');
      }
      self.hideButton('check-answer');
      self.hideButton('show-solution');

      self.read(self.params.displaySolutionDescription);
      self.toggleSelectable(true);
    }, false, {
      'aria-label': this.params.a11yShowSolution,
    });
  };

  /**
   * Toggle whether words can be selected
   * @param {Boolean} disable
   */
  MarkTheWords.prototype.toggleSelectable = function (disable) {
    this.keyboardNavigators.forEach(function (navigator) {
      if (disable) {
        navigator.disableSelectability();
        navigator.removeAllTabbable();
      }
      else {
        navigator.enableSelectability();
        navigator.setTabbableAt((0));
      }
    });

    if (disable) {
      this.$wordContainer.removeAttr('aria-multiselectable').removeAttr('role');
    }
    else {
      this.$wordContainer.attr('aria-multiselectable', 'true')
        .attr('role', 'listbox');
    }
  };

  /**
   * Get Xapi Data.
   *
   * @see used in contracts {@link https://h5p.org/documentation/developers/contracts#guides-header-6}
   * @return {Object}
   */
  MarkTheWords.prototype.getXAPIData = function () {
    return {
      statement: this.XapiGenerator.generateAnsweredEvent().data.statement
    };
  };

  /**
   * Mark the words as correct, wrong or missed.
   *
   * @fires MarkTheWords#resize
   */
  MarkTheWords.prototype.setAllMarks = function () {
    this.selectableWords.forEach(function (entry) {
      entry.markCheck();
      entry.clearScorePoint();
    });

    /**
     * Resize event
     *
     * @event MarkTheWords#resize
     */
    this.trigger('resize');
  };

  /**
   * Mark the selected words as correct or wrong.
   *
   * @fires MarkTheWords#resize
   */
  MarkTheWords.prototype.feedbackSelectedWords = function () {
    var self = this;

    var scorePoints;
    if (self.params.behaviour.showScorePoints) {
      scorePoints = new H5P.Question.ScorePoints();
    }

    this.selectableWords.forEach(function (entry) {
      if (entry.isSelected()) {
        entry.markCheck(scorePoints);
      }
    });

    this.$wordContainer.addClass('h5p-disable-hover');
    this.trigger('resize');
  };

  /**
   * Evaluate task and display score text for word markings.
   *
   * @fires MarkTheWords#resize
   * @return {Boolean} Returns true if maxScore was achieved.
   */
  MarkTheWords.prototype.showEvaluation = function (answers) {
    this.hideEvaluation();
    var score = answers.score;

    //replace editor variables with values, uses regexp to replace all instances.
    var scoreText = H5P.Question.determineOverallFeedback(this.params.overallFeedback, score / this.answers).replace(/@score/g, score.toString())
      .replace(/@total/g, this.answers.toString())
      .replace(/@correct/g, answers.correct.toString())
      .replace(/@wrong/g, answers.wrong.toString())
      .replace(/@missed/g, answers.missed.toString());

    this.setFeedback(scoreText, score, this.answers, this.params.scoreBarLabel);

    this.trigger('resize');
    return score === this.answers;
  };

  /**
   * Clear the evaluation text.
   *
   * @fires MarkTheWords#resize
   */
  MarkTheWords.prototype.hideEvaluation = function () {
    this.removeFeedback();
    this.trigger('resize');
  };

  /**
   * Calculate the score.
   *
   * @return {Answers}
   */
  MarkTheWords.prototype.calculateScore = function () {
    var self = this;

    /**
     * @typedef {Object} Answers
     * @property {number} correct The number of correct answers
     * @property {number} wrong The number of wrong answers
     * @property {number} missed The number of answers the user missed
     * @property {number} score The calculated score
     */
    var initial = {
      correct: 0,
      wrong: 0,
      missed: 0,
      score: 0
    };

    // iterate over words, and calculate score
    var answers = self.selectableWords.reduce(function (result, word) {
      if (word.isCorrect()) {
        result.correct++;
      }
      else if (word.isWrong()) {
        result.wrong++;
      }
      else if (word.isMissed()) {
        result.missed++;
      }

      return result;
    }, initial);

    // if no wrong answers, and black is correct
    if (answers.wrong === 0 && self.blankIsCorrect) {
      answers.correct = 1;
    }

    // no negative score
    answers.score = Math.max(answers.correct - answers.wrong, 0);

    return answers;
  };

  /**
   * Clear styling on marked words.
   *
   * @fires MarkTheWords#resize
   */
  MarkTheWords.prototype.clearAllMarks = function () {
    this.selectableWords.forEach(function (entry) {
      entry.markClear();
    });

    this.$wordContainer.removeClass('h5p-disable-hover');
    this.trigger('resize');
  };

  /**
   * Returns true if task is checked or a word has been clicked
   *
   * @see {@link https://h5p.org/documentation/developers/contracts|Needed for contracts.}
   * @returns {Boolean} Always returns true.
   */
  MarkTheWords.prototype.getAnswerGiven = function () {
    return this.blankIsCorrect ? true : this.isAnswered;
  };

  /**
   * Counts the score, which is correct answers subtracted by wrong answers.
   *
   * @see {@link https://h5p.org/documentation/developers/contracts|Needed for contracts.}
   * @returns {Number} score The amount of points achieved.
   */
  MarkTheWords.prototype.getScore = function () {
    return this.calculateScore().score;
  };

  /**
   * Gets max score for this task.
   *
   * @see {@link https://h5p.org/documentation/developers/contracts|Needed for contracts.}
   * @returns {Number} maxScore The maximum amount of points achievable.
   */
  MarkTheWords.prototype.getMaxScore = function () {
    return this.answers;
  };

  /**
   * Get title
   * @returns {string}
   */
  MarkTheWords.prototype.getTitle = function () {
    return H5P.createTitle((this.contentData && this.contentData.metadata && this.contentData.metadata.title) ? this.contentData.metadata.title : 'Mark the Words');
  };

  /**
   * Display the evaluation of the task, with proper markings.
   *
   * @fires MarkTheWords#resize
   * @see {@link https://h5p.org/documentation/developers/contracts|Needed for contracts.}
   */
  MarkTheWords.prototype.showSolutions = function () {
    var answers = this.calculateScore();
    this.showEvaluation(answers);
    this.setAllMarks();
    this.read(this.params.displaySolutionDescription);
    this.hideButton('try-again');
    this.hideButton('show-solution');
    this.hideButton('check-answer');
    this.$a11yClickableTextLabel.html(this.params.a11ySolutionModeHeader + ' - ' + this.params.a11yClickableTextLabel);

    this.toggleSelectable(true);
    this.trigger('resize');
  };

  /**
   * Resets the task back to its' initial state.
   *
   * @fires MarkTheWords#resize
   * @see {@link https://h5p.org/documentation/developers/contracts|Needed for contracts.}
   */
  MarkTheWords.prototype.resetTask = function () {
    this.isAnswered = false;
    this.clearAllMarks();
    this.hideEvaluation();
    this.hideButton('try-again');
    this.hideButton('show-solution');
    this.showButton('check-answer');
    this.$a11yClickableTextLabel.html(this.params.a11yClickableTextLabel);

    this.toggleSelectable(false);
    this.trigger('resize');
  };

  /**
   * Returns an object containing the selected words
   *
   * @public
   * @returns {object} containing indexes of selected words
   */
  MarkTheWords.prototype.getCurrentState = function () {
    var selectedWordsIndexes = [];
    if (this.selectableWords === undefined) {
      return undefined;
    }

    this.selectableWords.forEach(function (selectableWord, swIndex) {
      if (selectableWord.isSelected()) {
        selectedWordsIndexes.push(swIndex);
      }
    });
    return selectedWordsIndexes;
  };

  /**
   * Sets answers to current user state
   */
  MarkTheWords.prototype.setH5PUserState = function () {
    var self = this;

    // Do nothing if user state is undefined
    if (this.previousState === undefined || this.previousState.length === undefined) {
      return;
    }

    // Select words from user state
    this.previousState.forEach(function (answeredWordIndex) {
      if (isNaN(answeredWordIndex) || answeredWordIndex >= self.selectableWords.length || answeredWordIndex < 0) {
        throw new Error('Stored user state is invalid');
      }

      self.isAnswered = true;
      self.selectableWords[answeredWordIndex].setSelected();
    });
  };

  /**
   * Register dom elements
   *
   * @see {@link https://github.com/h5p/h5p-question/blob/1558b6144333a431dd71e61c7021d0126b18e252/scripts/question.js#L1236|Called from H5P.Question}
   */
  MarkTheWords.prototype.registerDomElements = function () {
    // Register optional media
    let media = this.params.media;
    if (media && media.type && media.type.library) {
      media = media.type;
      const type = media.library.split(' ')[0];
      if (type === 'H5P.Image') {
        if (media.params.file) {
          // Register task image
          this.setImage(media.params.file.path, {
            disableImageZooming: this.params.media.disableImageZooming || false,
            alt: media.params.alt,
            title: media.params.title,
            expandImage: media.params.expandImage,
            minimizeImage: media.params.minimizeImage
          });
        }
      }
      else if (type === 'H5P.Video') {
        if (media.params.sources) {
          // Register task video
          this.setVideo(media);
        }
      }
      else if (type === 'H5P.Audio') {
        if (media.params.files) {
          // Register task audio
          this.setAudio(media);
        }
      }
    }

    // wrap introduction in div with id
    var introduction = '<div id="' + this.introductionId + '">' + this.params.taskDescription + '</div>';

    // Register description
    this.setIntroduction(introduction);

    // creates aria descriptions for correct/incorrect/missed
    this.createDescriptionsDom().appendTo(this.$inner);

    // Register content
    this.setContent(this.$inner, {
      'class': 'h5p-word'
    });

    // Register buttons
    this.addButtons();
  };

  /**
   * Creates dom with description to be used with aria-describedby
   * @return {jQuery}
   */
  MarkTheWords.prototype.createDescriptionsDom = function () {
    var self = this;
    var $el = $('<div class="h5p-mark-the-words-descriptions"></div>');

    $('<div id="' + Word.ID_MARK_CORRECT + '">' + self.params.correctAnswer + '</div>').appendTo($el);
    $('<div id="' + Word.ID_MARK_INCORRECT + '">' + self.params.incorrectAnswer + '</div>').appendTo($el);
    $('<div id="' + Word.ID_MARK_MISSED + '">' + self.params.missedAnswer + '</div>').appendTo($el);

    return $el;
  };

  return MarkTheWords;
}(H5P.jQuery, H5P.Question, H5P.MarkTheWords.Word, H5P.KeyboardNav, H5P.MarkTheWords.XapiGenerator));

/**
 * Static utility method for parsing H5P.MarkTheWords content item questions
 * into format useful for generating reports.
 *
 * Example input: "<p lang=\"en\">I like *pizza* and *burgers*.</p>"
 *
 * Produces the following:
 * [
 *   {
 *     type: 'text',
 *     content: 'I like '
 *   },
 *   {
 *     type: 'answer',
 *     correct: 'pizza',
 *   },
 *   {
 *     type: 'text',
 *     content: ' and ',
 *   },
 *   {
 *     type: 'answer',
 *     correct: 'burgers'
 *   },
 *   {
 *     type: 'text',
 *     content: '.'
 *   }
 * ]
 *
 * @param {string} question MarkTheWords textField (html)
 */
H5P.MarkTheWords.parseText = function (question) {

  /**
   * Separate all words surrounded by a space and an asterisk and any other
   * sequence of non-whitespace characters from str into an array.
   *
   * @param {string} str
   * @returns {string[]} array of all words in the given string
   */
  function getWords(str) {
    return str.match(/ \*[^\*]+\* |[^\s]+/g);
  }

  /**
   * Replace each HTML tag in str with the provided value and return the resulting string
   *
   * Regexp expression explained:
   *   <     - first character is '<'
   *   [^>]* - followed by zero or more occurences of any character except '>'
   *   >     - last character is '>'
   **/
  function replaceHtmlTags(str, value) {
    return str.replace(/<[^>]*>/g, value);
  }

  function startsAndEndsWith(char, str) {
    return str.startsWith(char) && str.endsWith(char);
  }

  function removeLeadingPunctuation(str) {
    return str.replace(/^[\[\({⟨¿¡“"«„]+/, '');
  }

  function removeTrailingPunctuation(str) {
    return str.replace(/[",….:;?!\]\)}⟩»”]+$/, '');
  }

  /**
   * Escape double asterisks ** = *, and remove single asterisk.
   * @param {string} str
   */
  function handleAsterisks(str) {
    var asteriskIndex = str.indexOf('*');

    while (asteriskIndex !== -1) {
      str = str.slice(0, asteriskIndex) + str.slice(asteriskIndex + 1, str.length);
      asteriskIndex = str.indexOf('*', asteriskIndex + 1);
    }
    return str;
  }

  /**
   * Decode HTML entities (e.g. &nbsp;) from the given string using the DOM API
   * @param {string} str
   */
  function decodeHtmlEntities(str) {
    const el = document.createElement('textarea');
    el.innerHTML = str;
    return el.value;
  }

  const wordsWithAsterisksNotRemovedYet = getWords(replaceHtmlTags(decodeHtmlEntities(question), ' '))
    .map(function (w) {
      return w.trim();
    })
    .map(function (w) {
      return removeLeadingPunctuation(w);
    })
    .map(function (w) {
      return removeTrailingPunctuation(w);
    });

  const allSelectableWords = wordsWithAsterisksNotRemovedYet.map(function (w) {
    return handleAsterisks(w);
  });

  const correctWordIndexes = [];

  const correctWords = wordsWithAsterisksNotRemovedYet
    .filter(function (w, i) {
      if (startsAndEndsWith('*', w)) {
        correctWordIndexes.push(i);
        return true;
      }
      return false;
    })
    .map(function (w) {
      return handleAsterisks(w);
    });

  const printableQuestion = replaceHtmlTags(decodeHtmlEntities(question), ' ')
    .replace('\xa0', '\x20');

  return {
    alternatives: allSelectableWords,
    correctWords: correctWords,
    correctWordIndexes: correctWordIndexes,
    textWithPlaceholders: printableQuestion.match(/[^\s]+/g)
      .reduce(function (textWithPlaceholders, word, index) {
        word = removeTrailingPunctuation(
          removeLeadingPunctuation(word));

        return textWithPlaceholders.replace(word, '%' + index);
      }, printableQuestion)
  };
};
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				case 'https':
					return;
			};

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			};
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				arguments[0]	= url2data(arguments[0]);
				return fetch.apply(this, arguments);
			};
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				arguments[1]	= url2data(arguments[1]);
				return xopen.apply(this, arguments);
			};
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